18642307980 has 48 divisors (see below), whose sum is σ = 53183348064. Its totient is φ = 4877483520.

The previous prime is 18642307979. The next prime is 18642308023. The reversal of 18642307980 is 8970324681.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2928001 + ... + 2934360.

It is an arithmetic number, because the mean of its divisors is an integer number (1107986418).

Almost surely, 2^18642307980 is an apocalyptic number.

18642307980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18642307980 is an abundant number, since it is smaller than the sum of its proper divisors (34541040084).

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

18642307980 is a wasteful number, since it uses less digits than its factorization.

18642307980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862426 (or 5862424 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 18642307980 in words is "eighteen billion, six hundred forty-two million, three hundred seven thousand, nine hundred eighty".