21888964032 has 56 divisors (see below), whose sum is σ = 62369523216. Its totient is φ = 6735065088.

The previous prime is 21888964007. The next prime is 21888964037. The reversal of 21888964032 is 23046988812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21888964037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4382313 + ... + 4387304.

It is an arithmetic number, because the mean of its divisors is an integer number (1113741486).

Almost surely, 2^21888964032 is an apocalyptic number.

It is an amenable number.

21888964032 is an abundant number, since it is smaller than the sum of its proper divisors (40480559184).

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

21888964032 is a wasteful number, since it uses less digits than its factorization.

21888964032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8769645 (or 8769635 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 21888964032 in words is "twenty-one billion, eight hundred eighty-eight million, nine hundred sixty-four thousand, thirty-two".