21621531662632 has 16 divisors (see below), whose sum is σ = 44225860219200. Its totient is φ = 9827968937520.

The previous prime is 21621531662609. The next prime is 21621531662683. The reversal of 21621531662632 is 23626613512612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122849611632 + ... + 122849611807.

It is an arithmetic number, because the mean of its divisors is an integer number (2764116263700).

Almost surely, 2^{21621531662632} is an apocalyptic number.

21621531662632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21621531662632 is an abundant number, since it is smaller than the sum of its proper divisors (22604328556568).

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

21621531662632 is a wasteful number, since it uses less digits than its factorization.

21621531662632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245699223456 (or 245699223452 counting only the distinct ones).

The product of its digits is 933120, while the sum is 46.

The spelling of 21621531662632 in words is "twenty-one trillion, six hundred twenty-one billion, five hundred thirty-one million, six hundred sixty-two thousand, six hundred thirty-two".