21532514260 has 12 divisors (see below), whose sum is σ = 45218279988. Its totient is φ = 8613005696.

The previous prime is 21532514249. The next prime is 21532514293. The reversal of 21532514260 is 6241523512.

It can be written as a sum of positive squares in 2 ways, for example, as 14427372996 + 7105141264 = 120114^2 + 84292^2 .

It is a congruent number.

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, 538312837 + ... + 538312876.

It is an arithmetic number, because the mean of its divisors is an integer number (3768189999).

Almost surely, 2^21532514260 is an apocalyptic number.

21532514260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21532514260 is an abundant number, since it is smaller than the sum of its proper divisors (23685765728).

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

21532514260 is a wasteful number, since it uses less digits than its factorization.

21532514260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076625722 (or 1076625720 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 21532514260 in words is "twenty-one billion, five hundred thirty-two million, five hundred fourteen thousand, two hundred sixty".