18387403700 has 18 divisors (see below), whose sum is σ = 39900666246. Its totient is φ = 7354961440.

The previous prime is 18387403673. The next prime is 18387403717. The reversal of 18387403700 is 730478381.

It can be written as a sum of positive squares in 3 ways, for example, as 6404160676 + 11983243024 = 80026^2 + 109468^2 .

It is a super-2 number, since 2×18387403700² (a number of 21 digits) contains 22 as substring.

It is a congruent 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, 91936919 + ... + 91937118.

Almost surely, 2^18387403700 is an apocalyptic number.

18387403700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18387403700 is an abundant number, since it is smaller than the sum of its proper divisors (21513262546).

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

18387403700 is a wasteful number, since it uses less digits than its factorization.

18387403700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183874051 (or 183874044 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 18387403700 in words is "eighteen billion, three hundred eighty-seven million, four hundred three thousand, seven hundred".