21204861976 has 16 divisors (see below), whose sum is σ = 39760767000. Its totient is φ = 10601990784.

The previous prime is 21204861913. The next prime is 21204862001. The reversal of 21204861976 is 67916840212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247600 + ... + 322048.

Almost surely, 2^21204861976 is an apocalyptic number.

It is an amenable number.

21204861976 is a deficient number, since it is larger than the sum of its proper divisors (18555905024).

21204861976 is a wasteful number, since it uses less digits than its factorization.

21204861976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110058 (or 110054 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 21204861976 in words is "twenty-one billion, two hundred four million, eight hundred sixty-one thousand, nine hundred seventy-six".