21365564460204 has 48 divisors (see below), whose sum is σ = 51943074220800. Its totient is φ = 6826804009536.

The previous prime is 21365564460193. The next prime is 21365564460241. The reversal of 21365564460204 is 40206446556312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220798032 + ... + 220894775.

It is an arithmetic number, because the mean of its divisors is an integer number (1082147379600).

Almost surely, 2^{21365564460204} is an apocalyptic number.

It is an amenable number.

21365564460204 is an abundant number, since it is smaller than the sum of its proper divisors (30577509760596).

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

21365564460204 is a wasteful number, since it uses less digits than its factorization.

21365564460204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441692982 (or 441692980 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 21365564460204 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred sixty-four million, four hundred sixty thousand, two hundred four".