18407020 has 24 divisors (see below), whose sum is σ = 38833200. Its totient is φ = 7328832.

The previous prime is 18407009. The next prime is 18407041. The reversal of 18407020 is 2070481.

It is a junction number, because it is equal to n+sod(n) for n = 18406982 and 18407000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2571 + ... + 6589.

It is an arithmetic number, because the mean of its divisors is an integer number (1618050).

Almost surely, 2^18407020 is an apocalyptic number.

18407020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18407020 is an abundant number, since it is smaller than the sum of its proper divisors (20426180).

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

18407020 is a wasteful number, since it uses less digits than its factorization.

18407020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257 (or 4255 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 18407020 is about 4290.3403128423. The cubic root of 18407020 is about 264.0347941591.

The spelling of 18407020 in words is "eighteen million, four hundred seven thousand, twenty".