18627379938 has 12 divisors (see below), whose sum is σ = 40359323238. Its totient is φ = 6209126640.

The previous prime is 18627379907. The next prime is 18627379973. The reversal of 18627379938 is 83997372681.

It can be written as a sum of positive squares in only one way, i.e., 12017202129 + 6610177809 = 109623^2 + 81303^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 517427203 + ... + 517427238.

Almost surely, 2^18627379938 is an apocalyptic number.

18627379938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18627379938 is an abundant number, since it is smaller than the sum of its proper divisors (21731943300).

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

18627379938 is a wasteful number, since it uses less digits than its factorization.

18627379938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034854449 (or 1034854446 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 18627379938 in words is "eighteen billion, six hundred twenty-seven million, three hundred seventy-nine thousand, nine hundred thirty-eight".