21753561260 has 12 divisors (see below), whose sum is σ = 45682478688. Its totient is φ = 8701424496.

The previous prime is 21753561259. The next prime is 21753561283. The reversal of 21753561260 is 6216535712.

It is a happy 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, 543839012 + ... + 543839051.

It is an arithmetic number, because the mean of its divisors is an integer number (3806873224).

Almost surely, 2^21753561260 is an apocalyptic number.

21753561260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21753561260 is an abundant number, since it is smaller than the sum of its proper divisors (23928917428).

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

21753561260 is a wasteful number, since it uses less digits than its factorization.

21753561260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087678072 (or 1087678070 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 21753561260 in words is "twenty-one billion, seven hundred fifty-three million, five hundred sixty-one thousand, two hundred sixty".