18838668538700 has 72 divisors (see below), whose sum is σ = 41458082450400. Its totient is φ = 7428904268800.

The previous prime is 18838668538673. The next prime is 18838668538757. The reversal of 18838668538700 is 783586683881.

It is a super-2 number, since 2×18838668538700² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140889476 + ... + 141023124.

It is an arithmetic number, because the mean of its divisors is an integer number (575806700700).

Almost surely, 2^{18838668538700} is an apocalyptic number.

18838668538700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18838668538700 is an abundant number, since it is smaller than the sum of its proper divisors (22619413911700).

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

18838668538700 is a wasteful number, since it uses less digits than its factorization.

18838668538700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153587 (or 153580 counting only the distinct ones).

The product of its (nonzero) digits is 371589120, while the sum is 71.

The spelling of 18838668538700 in words is "eighteen trillion, eight hundred thirty-eight billion, six hundred sixty-eight million, five hundred thirty-eight thousand, seven hundred".