21939175882392 has 32 divisors (see below), whose sum is σ = 55390988620080. Its totient is φ = 7240652105600.

The previous prime is 21939175882303. The next prime is 21939175882411. The reversal of 21939175882392 is 29328857193912.

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, 4525405143 + ... + 4525409990.

Almost surely, 2^{21939175882392} is an apocalyptic number.

It is an amenable number.

21939175882392 is an abundant number, since it is smaller than the sum of its proper divisors (33451812737688).

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

21939175882392 is a wasteful number, since it uses less digits than its factorization.

21939175882392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050815243 (or 9050815239 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 69.

The spelling of 21939175882392 in words is "twenty-one trillion, nine hundred thirty-nine billion, one hundred seventy-five million, eight hundred eighty-two thousand, three hundred ninety-two".