21845588832 has 72 divisors (see below), whose sum is σ = 62763920856. Its totient is φ = 7206782976.

The previous prime is 21845588819. The next prime is 21845588837. The reversal of 21845588832 is 23888554812.

21845588832 is a `hidden beast` number, since 2 + 1 + 8 + 4 + 558 + 8 + 83 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21845588837) 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, 363058 + ... + 418929.

It is an arithmetic number, because the mean of its divisors is an integer number (871721123).

Almost surely, 2^21845588832 is an apocalyptic number.

It is an amenable number.

21845588832 is an abundant number, since it is smaller than the sum of its proper divisors (40918332024).

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

21845588832 is a wasteful number, since it uses less digits than its factorization.

21845588832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782100 (or 782089 counting only the distinct ones).

The product of its digits is 4915200, while the sum is 54.

The spelling of 21845588832 in words is "twenty-one billion, eight hundred forty-five million, five hundred eighty-eight thousand, eight hundred thirty-two".