21392372957024 has 48 divisors (see below), whose sum is σ = 42626003737968. Its totient is φ = 10567112957952.

The previous prime is 21392372957017. The next prime is 21392372957041. The reversal of 21392372957024 is 42075927329312.

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, 4373117 + ... + 7868220.

It is an arithmetic number, because the mean of its divisors is an integer number (888041744541).

Almost surely, 2^{21392372957024} is an apocalyptic number.

It is an amenable number.

21392372957024 is a deficient number, since it is larger than the sum of its proper divisors (21233630780944).

21392372957024 is a wasteful number, since it uses less digits than its factorization.

21392372957024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12242007 (or 12241999 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 21392372957024 in words is "twenty-one trillion, three hundred ninety-two billion, three hundred seventy-two million, nine hundred fifty-seven thousand, twenty-four".