21623560322660 has 48 divisors (see below), whose sum is σ = 46374346352880. Its totient is φ = 8467563878400.

The previous prime is 21623560322641. The next prime is 21623560322701. The reversal of 21623560322660 is 6622306532612.

It can be written as a sum of positive squares in 8 ways, for example, as 1387669864036 + 20235890458624 = 1177994^2 + 4498432^2 .

It is a super-2 number, since 2×21623560322660² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59959169 + ... + 60318728.

It is an arithmetic number, because the mean of its divisors is an integer number (966132215685).

Almost surely, 2^{21623560322660} is an apocalyptic number.

21623560322660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21623560322660 is an abundant number, since it is smaller than the sum of its proper divisors (24750786030220).

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

21623560322660 is a wasteful number, since it uses less digits than its factorization.

21623560322660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120278096 (or 120278094 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 21623560322660 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred sixty million, three hundred twenty-two thousand, six hundred sixty".