21796156 has 24 divisors (see below), whose sum is σ = 39223296. Its totient is φ = 10592880.

The previous prime is 21796129. The next prime is 21796163. The reversal of 21796156 is 65169712.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35605 + ... + 36211.

It is an arithmetic number, because the mean of its divisors is an integer number (1634304).

Almost surely, 2^21796156 is an apocalyptic number.

It is an amenable number.

21796156 is a deficient number, since it is larger than the sum of its proper divisors (17427140).

21796156 is a wasteful number, since it uses less digits than its factorization.

21796156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 847 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 21796156 is about 4668.6353466511. The cubic root of 21796156 is about 279.3358237402.

It can be divided in two parts, 21796 and 156, that added together give a cube (21952 = 28³).

The spelling of 21796156 in words is "twenty-one million, seven hundred ninety-six thousand, one hundred fifty-six".