21313425288 has 32 divisors (see below), whose sum is σ = 55002389760. Its totient is φ = 6875298240.

The previous prime is 21313425269. The next prime is 21313425347. The reversal of 21313425288 is 88252431312.

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, 14322795 + ... + 14324282.

It is an arithmetic number, because the mean of its divisors is an integer number (1718824680).

Almost surely, 2^21313425288 is an apocalyptic number.

It is an amenable number.

21313425288 is an abundant number, since it is smaller than the sum of its proper divisors (33688964472).

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

21313425288 is a wasteful number, since it uses less digits than its factorization.

21313425288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28647117 (or 28647113 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The spelling of 21313425288 in words is "twenty-one billion, three hundred thirteen million, four hundred twenty-five thousand, two hundred eighty-eight".