24 (twenty-four) is the natural number following 23 and preceding 25. It is equal to two dozen and one sixth of a gross.

24 is an even composite number, a highly composite number, an abundant number, a practical number, and a congruent number. The many ways 24 can be constructed inspired a children's mathematical game involving the use of any of the four standard operations on four numbers on a card to get 24 (see 24 Game).

24 is also part of the only nontrivial solution pair to the cannonball problem,^[1] and the kissing number in 4-dimensional space. An icositetragon is a regular polygon with 24 sides. A tesseract has 24 two-dimensional square faces.

• In Christian apocalyptic literature it represents the complete Church, being the sum of the 12 tribes of Israel and the 12 Apostles of the Lamb of God. For example, in The Book of Revelation: "Surrounding the throne were twenty-four other thrones, and seated on them were twenty-four elders. They were dressed in white and had crowns of gold on their heads."^[2]
• Number of Tirthankaras in Jainism.
• Number of spokes in the Ashok Chakra.

• In Brazil, twenty-four is associated with homosexuality as it is the number that stands for the deer in a game known as “jogo do bicho”.
• There are 24 hours in a day.

• My Favorite Numbers: 24, John C. Baez