18357689536 has 28 divisors (see below), whose sum is σ = 36558214920. Its totient is φ = 9146170880.

The previous prime is 18357689491. The next prime is 18357689549. The reversal of 18357689536 is 63598675381.

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, 492406 + ... + 528373.

Almost surely, 2^18357689536 is an apocalyptic number.

18357689536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18357689536 is a deficient number, since it is larger than the sum of its proper divisors (18200525384).

18357689536 is a wasteful number, since it uses less digits than its factorization.

18357689536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021072 (or 1021062 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 61.

The spelling of 18357689536 in words is "eighteen billion, three hundred fifty-seven million, six hundred eighty-nine thousand, five hundred thirty-six".