21632157588660 has 48 divisors (see below), whose sum is σ = 60570946770432. Its totient is φ = 5768489116800.

The previous prime is 21632157588641. The next prime is 21632157588661. The reversal of 21632157588660 is 6688575123612.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 21632157588594 and 21632157588603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632157588661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1403325 + ... + 6725595.

It is an arithmetic number, because the mean of its divisors is an integer number (1261894724384).

Almost surely, 2^{21632157588660} is an apocalyptic number.

21632157588660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21632157588660 is an abundant number, since it is smaller than the sum of its proper divisors (38938789181772).

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

21632157588660 is a wasteful number, since it uses less digits than its factorization.

21632157588660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390024 (or 5390022 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 21632157588660 in words is "twenty-one trillion, six hundred thirty-two billion, one hundred fifty-seven million, five hundred eighty-eight thousand, six hundred sixty".