Suriya who is famous for doing stunts without body doubles risked his life by jumping from a running train which is 90+ feet high.

The duration of movie is 164 mins. Product of the digits1x6x4 gives a 24. Also the story at the beginning of the movie happens on 13-01-1990 sum of the digits give again a 24. Not a coincidence

In an interview with The Hindu, Suriya told that recording of one more track was completed by September 2015. According to lyricist Madhan Karky, for the track "Naan Un", Rahman had composed a tune and wanted him to write something. He came up with the lines - "Naan Un Azhaginile Deivam Unarugiren". Rahman usually reads something for inspiration before composing the tunes and for this particular situation of composing the track, he had picked up a random page from a book and the lines he read there were: "In your beauty I see the manifestation of God" which translates back to "Naan Un Azhaginile Deivam Unarugiren". Karky noted this co-incidence on composing the track

This is the second tamil movie to feature time travelling, after Indru Netru Nallai.

Suriya appearing as an old man in this film, for which the make up takes about 5hr to complete

In 24 movie, Suriya is doing a triple role for the first time.

In the film, the villain, Athreya, has the habit of telling a punch dialogue "Aayushman Bhava" which translates to "May you live long" before killing someone. As it turns out, none of those killed by him in the film are actually dead or are brought back to life by time travel, thereby justifying the "Aayushman Bhava" dialogue.

The development of this film dates back to 2009, where the film was to feature actors Vikram and Ileana D'Cruz in lead roles. However, in February 2010, the film was dropped due to difference in opinions between director, producer and actor.

During one of the scenes, the hero tells the repair cost of a watch as Rs.247. This cost value depicts the value 24x7 of time

The trailer, teaser and the first look posters featured Suriya as a paraglider. However, the paragliding sequences were removed by the film editor due to time constraints. In an interview, the editor stated that paragliding is Manis (character played by Suriya) hobby and was supposed to be featured as an introductory scene for Mani. Later, he stated that the deleted scene would be featured in the second part of the film; planned as 24 Decoded.

In an interview, Vikram Kumar has said that Athreya's appearance is inspired from Stephen Hawking.

Originally Suriya was going to play the double role in the movie, playing father and son. Actor Surya really wanted Malayalam actor Kalabhavan Mani to play the role of villain Athreya, but Kalabhavan Mani declined the offer. The role was finally played by Surya himself, making his first triple role in his filmography.

The antagonist name is 'Athreya' which means 'One who wants what he asks' reasoning his character and his best friend's name is 'Mithran' which means 'Friend'

Initially the film had a duration of 2 hours 44 minutes bt later it had been trimmed to 2 hours 34 minutes in order to make it racy.

The time controlling device isn't a car or a big structure as like in other movies, in this movie it is symbolically a watch. Well, what else comes to our mind other than a watch, when speaking about time.

Bollywood actor Anil Kapoor planned an action against Suriya and his production house 2D Entertainment due to the use of '24' in the film title. It seemed similar to the American TV series 24, for which Kapoor had bought the remake rights from 20th Century Fox International TV. Later legal issue was settled outside the court before the movie release.

The main lead's character name is 'mani' which means 'Time' in English. This is a time travel movie.

The movie grossed about 157 Cr box office. It crossed the previous 100 cr record of suria movie Singham 2.

Sathyabhama is a legendary Hindu character known for her love and maternity. This name is given to the love interest of the male lead as 'Bhama' corresponding the lovable character and then to the mother of Mani as 'Sathya' corresponding to motherhood.

The film received two Awards at the 2017 Vikatan Awards - Best Visual Effects for Julian Trousselliar and Best Art Direction for Amit and Subrata.

It won two awards - Best Cinematography and Best Production Design - at the 64th National Film Awards.

This movie is different from Indru Netru Naalai. In this movie, whoever uses or touches the watch, travels back in time and wakes up in their younger form with the memories of future. And the device has time freeze option too. Whereas in Indru Netru Naalai, the users travel with their present bodies to the past and too their past bodies exist in the same time. In other words, one's present character and past character can exist at the same time.

24 movie is little different from other time traveling movies. The movie deals with a logic where the users can travel back and forth in time only for the time inbetween 24 hours of a day (The reason for the title of this movie). They can't go to yesterday nor tomorrow, where the date and year are added later to the watch as a part of the story.

24 film Grossed ultimately 73.8 crores in 7 days and grossed 100 crores in 10 days Worldwide Box Office.