18188892980 has 54 divisors (see below), whose sum is σ = 38999505426. Its totient is φ = 7125737216.

The previous prime is 18188892979. The next prime is 18188892991. The reversal of 18188892980 is 8929888181.

It can be written as a sum of positive squares in 9 ways, for example, as 5836348816 + 12352544164 = 76396^2 + 111142^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31966136 + ... + 31966704.

Almost surely, 2^18188892980 is an apocalyptic number.

18188892980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18188892980 is an abundant number, since it is smaller than the sum of its proper divisors (20810612446).

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

18188892980 is an frugal number, since it uses more digits than its factorization.

18188892980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 62.

The spelling of 18188892980 in words is "eighteen billion, one hundred eighty-eight million, eight hundred ninety-two thousand, nine hundred eighty".