21534053832 has 48 divisors (see below), whose sum is σ = 58480381440. Its totient is φ = 7158450528.

The previous prime is 21534053831. The next prime is 21534053851. The reversal of 21534053832 is 23835043512.

21534053832 is a `hidden beast` number, since 2 + 1 + 53 + 40 + 538 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21534053831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381048 + ... + 433895.

It is an arithmetic number, because the mean of its divisors is an integer number (1218341280).

Almost surely, 2^21534053832 is an apocalyptic number.

It is an amenable number.

21534053832 is an abundant number, since it is smaller than the sum of its proper divisors (36946327608).

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

21534053832 is a wasteful number, since it uses less digits than its factorization.

21534053832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815322 (or 815315 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 21534053832 in words is "twenty-one billion, five hundred thirty-four million, fifty-three thousand, eight hundred thirty-two".