21459812364 has 36 divisors (see below), whose sum is σ = 54354391000. Its totient is φ = 7138929600.

The previous prime is 21459812323. The next prime is 21459812377. The reversal of 21459812364 is 46321895412.

21459812364 is a `hidden beast` number, since 2 + 14 + 598 + 12 + 36 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 579337 + ... + 615264.

Almost surely, 2^21459812364 is an apocalyptic number.

It is an amenable number.

21459812364 is an abundant number, since it is smaller than the sum of its proper divisors (32894578636).

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

21459812364 is a wasteful number, since it uses less digits than its factorization.

21459812364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195110 (or 1195105 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 21459812364 in words is "twenty-one billion, four hundred fifty-nine million, eight hundred twelve thousand, three hundred sixty-four".