21656323962 has 48 divisors (see below), whose sum is σ = 57750201600. Its totient is φ = 5711557536.

The previous prime is 21656323951. The next prime is 21656323967. The reversal of 21656323962 is 26932365612.

21656323962 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 632 + 3 + 9 + 6 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (21656323967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6608962 + ... + 6612237.

It is an arithmetic number, because the mean of its divisors is an integer number (1203129200).

Almost surely, 2^21656323962 is an apocalyptic number.

21656323962 is an abundant number, since it is smaller than the sum of its proper divisors (36093877638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21656323962 is a wasteful number, since it uses less digits than its factorization.

21656323962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13221227 (or 13221224 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 21656323962 in words is "twenty-one billion, six hundred fifty-six million, three hundred twenty-three thousand, nine hundred sixty-two".