21204674590 has 16 divisors (see below), whose sum is σ = 41638270320. Its totient is φ = 7710790720.

The previous prime is 21204674587. The next prime is 21204674629. The reversal of 21204674590 is 9547640212.

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, 96384775 + ... + 96384994.

It is an arithmetic number, because the mean of its divisors is an integer number (2602391895).

Almost surely, 2^21204674590 is an apocalyptic number.

21204674590 is a deficient number, since it is larger than the sum of its proper divisors (20433595730).

21204674590 is a wasteful number, since it uses less digits than its factorization.

21204674590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192769787.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 21204674590 in words is "twenty-one billion, two hundred four million, six hundred seventy-four thousand, five hundred ninety".