21929213832 has 32 divisors (see below), whose sum is σ = 55326004800. Its totient is φ = 7242675264.

The previous prime is 21929213819. The next prime is 21929213851. The reversal of 21929213832 is 23831292912.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4188748 + ... + 4193979.

It is an arithmetic number, because the mean of its divisors is an integer number (1728937650).

Almost surely, 2^21929213832 is an apocalyptic number.

It is an amenable number.

21929213832 is an abundant number, since it is smaller than the sum of its proper divisors (33396790968).

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

21929213832 is a wasteful number, since it uses less digits than its factorization.

21929213832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8382845 (or 8382841 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The spelling of 21929213832 in words is "twenty-one billion, nine hundred twenty-nine million, two hundred thirteen thousand, eight hundred thirty-two".