18949686372 has 48 divisors (see below), whose sum is σ = 49160372800. Its totient is φ = 6312504960.

The previous prime is 18949686367. The next prime is 18949686391. The reversal of 18949686372 is 27368694981.

18949686372 is a `hidden beast` number, since 1 + 89 + 496 + 8 + 63 + 7 + 2 = 666.

It is a super-2 number, since 2×18949686372² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114972 + ... + 226092.

Almost surely, 2^18949686372 is an apocalyptic number.

18949686372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18949686372 is an abundant number, since it is smaller than the sum of its proper divisors (30210686428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18949686372 is a wasteful number, since it uses less digits than its factorization.

18949686372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112713 (or 112705 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 18949686372 in words is "eighteen billion, nine hundred forty-nine million, six hundred eighty-six thousand, three hundred seventy-two".