18712857392 has 10 divisors (see below), whose sum is σ = 36256161228. Its totient is φ = 9356428688.

The previous prime is 18712857349. The next prime is 18712857407. The reversal of 18712857392 is 29375821781.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 584776778 + ... + 584776809.

Almost surely, 2^18712857392 is an apocalyptic number.

It is an amenable number.

18712857392 is a deficient number, since it is larger than the sum of its proper divisors (17543303836).

18712857392 is a wasteful number, since it uses less digits than its factorization.

18712857392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169553595 (or 1169553589 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 53.

The spelling of 18712857392 in words is "eighteen billion, seven hundred twelve million, eight hundred fifty-seven thousand, three hundred ninety-two".