Twenty thousand six hundred forty
20640 is an even number.
20640 is a Harshad number, which means it is divisible by the sum of its digits (2 + 0 + 6 + 4 + 0 = 12, and 20640 is divisible by 12).
In binary, 20640 is represented as 101000010100000.
In hex, 20640 is represented as 50a0.
Prime factorization of 20640: 25 * 3 * 5 * 43.
Factors of 20640 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 43, 48, 60, 80, 86, 96, 120, 129, 160, 172, 215, 240, 258, 344, 430, 480, 516, 645, 688, 860, 1032, 1290, 1376, 1720, 2064, 2580, 3440, 4128, 5160, 6880, 10320, 20640.