18688063900 has 36 divisors (see below), whose sum is σ = 44239746600. Its totient is φ = 6795659200.

The previous prime is 18688063831. The next prime is 18688063981. The reversal of 18688063900 is 936088681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8493475 + ... + 8495674.

It is an arithmetic number, because the mean of its divisors is an integer number (1228881850).

Almost surely, 2^18688063900 is an apocalyptic number.

18688063900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18688063900 is an abundant number, since it is smaller than the sum of its proper divisors (25551682700).

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

18688063900 is a wasteful number, since it uses less digits than its factorization.

18688063900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16989174 (or 16989167 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 18688063900 in words is "eighteen billion, six hundred eighty-eight million, sixty-three thousand, nine hundred".