24 (twenty-four) is a positive integer following 23 and preceding 25.

Properties Edit

24 is an even composite number and the fourth factorial number.

There are 24 hours in a day.

The 24th of December is known around the world as Christmas eve.

In googology Edit

In Greek-based number-naming systems, 24 is associated with prefix "tetraicosa-", and with prefix "quattuorviginti-" in Latin systems.

Furthermore, it is the largest number n with the following property: Let f: ℕ → ℕ, f(a) = aa. Then for every a ∈ ℕ, there is a b ∈ ℕ, such that fb+1(a) ≡ fb(a) (mod n).

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