21572898260 has 24 divisors (see below), whose sum is σ = 45306384480. Its totient is φ = 8628531104.

The previous prime is 21572898253. The next prime is 21572898283. The reversal of 21572898260 is 6289827512.

It is a super-2 number, since 2×21572898260² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21572898199 and 21572898208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324551 + ... + 385329.

It is an arithmetic number, because the mean of its divisors is an integer number (1887766020).

Almost surely, 2^21572898260 is an apocalyptic number.

21572898260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21572898260 is an abundant number, since it is smaller than the sum of its proper divisors (23733486220).

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

21572898260 is a wasteful number, since it uses less digits than its factorization.

21572898260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78535 (or 78533 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 21572898260 in words is "twenty-one billion, five hundred seventy-two million, eight hundred ninety-eight thousand, two hundred sixty".