18200020188 has 48 divisors (see below), whose sum is σ = 48708660224. Its totient is φ = 5181226560.

The previous prime is 18200020177. The next prime is 18200020213. The reversal of 18200020188 is 88102000281.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367828 + ... + 414363.

Almost surely, 2^18200020188 is an apocalyptic number.

It is an amenable number.

18200020188 is an abundant number, since it is smaller than the sum of its proper divisors (30508640036).

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

18200020188 is a wasteful number, since it uses less digits than its factorization.

18200020188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782482 (or 782480 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The spelling of 18200020188 in words is "eighteen billion, two hundred million, twenty thousand, one hundred eighty-eight".