18407980 has 12 divisors (see below), whose sum is σ = 38656800. Its totient is φ = 7363184.

The previous prime is 18407947. The next prime is 18407993. The reversal of 18407980 is 8970481.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460180 + ... + 460219.

It is an arithmetic number, because the mean of its divisors is an integer number (3221400).

Almost surely, 2^18407980 is an apocalyptic number.

18407980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18407980 is an abundant number, since it is smaller than the sum of its proper divisors (20248820).

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

18407980 is a wasteful number, since it uses less digits than its factorization.

18407980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920408 (or 920406 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 18407980 is about 4290.4521906205. The cubic root of 18407980 is about 264.0393842375.

The spelling of 18407980 in words is "eighteen million, four hundred seven thousand, nine hundred eighty".