21390022832 has 40 divisors (see below), whose sum is σ = 42140880192. Its totient is φ = 10515110400.

The previous prime is 21390022831. The next prime is 21390022853. The reversal of 21390022832 is 23822009312.

It is not an unprimeable number, because it can be changed into a prime (21390022831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3785033 + ... + 3790679.

Almost surely, 2^21390022832 is an apocalyptic number.

It is an amenable number.

21390022832 is a deficient number, since it is larger than the sum of its proper divisors (20750857360).

21390022832 is a wasteful number, since it uses less digits than its factorization.

21390022832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9597 (or 9591 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 21390022832 in words is "twenty-one billion, three hundred ninety million, twenty-two thousand, eight hundred thirty-two".