21973182256 has 20 divisors (see below), whose sum is σ = 42605804304. Its totient is φ = 10978136000.

The previous prime is 21973182247. The next prime is 21973182271. The reversal of 21973182256 is 65228137912.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506980 + ... + 548611.

Almost surely, 2^21973182256 is an apocalyptic number.

It is an amenable number.

21973182256 is a deficient number, since it is larger than the sum of its proper divisors (20632622048).

21973182256 is a wasteful number, since it uses less digits than its factorization.

21973182256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056900 (or 1056894 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The spelling of 21973182256 in words is "twenty-one billion, nine hundred seventy-three million, one hundred eighty-two thousand, two hundred fifty-six".