21306052160 has 28 divisors (see below), whose sum is σ = 50735037468. Its totient is φ = 8522420736.

The previous prime is 21306052147. The next prime is 21306052171. The reversal of 21306052160 is 6125060312.

It can be written as a sum of positive squares in 2 ways, for example, as 10538254336 + 10767797824 = 102656^2 + 103768^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33290387 + ... + 33291026.

Almost surely, 2^21306052160 is an apocalyptic number.

21306052160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21306052160 is an abundant number, since it is smaller than the sum of its proper divisors (29428985308).

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

21306052160 is an equidigital number, since it uses as much as digits as its factorization.

21306052160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66581430 (or 66581420 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 21306052160 in words is "twenty-one billion, three hundred six million, fifty-two thousand, one hundred sixty".