21419564604 has 24 divisors (see below), whose sum is σ = 51702398160. Its totient is φ = 6893652864.

The previous prime is 21419564581. The next prime is 21419564611. The reversal of 21419564604 is 40646591412.

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, 30774889 + ... + 30775584.

It is an arithmetic number, because the mean of its divisors is an integer number (2154266590).

Almost surely, 2^21419564604 is an apocalyptic number.

It is an amenable number.

21419564604 is an abundant number, since it is smaller than the sum of its proper divisors (30282833556).

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

21419564604 is a wasteful number, since it uses less digits than its factorization.

21419564604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61550509 (or 61550507 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 21419564604 in words is "twenty-one billion, four hundred nineteen million, five hundred sixty-four thousand, six hundred four".