21204163012 has 24 divisors (see below), whose sum is σ = 37423048320. Its totient is φ = 10512182400.

The previous prime is 21204163009. The next prime is 21204163021. The reversal of 21204163012 is 21036140212.

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, 228289 + ... + 307447.

It is an arithmetic number, because the mean of its divisors is an integer number (1559293680).

Almost surely, 2^21204163012 is an apocalyptic number.

It is an amenable number.

21204163012 is a deficient number, since it is larger than the sum of its proper divisors (16218885308).

21204163012 is a wasteful number, since it uses less digits than its factorization.

21204163012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79731 (or 79729 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 21204163012 in words is "twenty-one billion, two hundred four million, one hundred sixty-three thousand, twelve".