21792956 has 24 divisors (see below), whose sum is σ = 38984400. Its totient is φ = 10657152.

The previous prime is 21792941. The next prime is 21792971. The reversal of 21792956 is 65929712.

It is an interprime number because it is at equal distance from previous prime (21792941) and next prime (21792971).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62270 + ... + 62618.

It is an arithmetic number, because the mean of its divisors is an integer number (1624350).

Almost surely, 2^21792956 is an apocalyptic number.

It is an amenable number.

21792956 is a deficient number, since it is larger than the sum of its proper divisors (17191444).

21792956 is a wasteful number, since it uses less digits than its factorization.

21792956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 651 counting only the distinct ones).

The product of its digits is 68040, while the sum is 41.

The square root of 21792956 is about 4668.2926215052. The cubic root of 21792956 is about 279.3221528528.

The spelling of 21792956 in words is "twenty-one million, seven hundred ninety-two thousand, nine hundred fifty-six".