18407968 has 12 divisors (see below), whose sum is σ = 36240750. Its totient is φ = 9203968.

The previous prime is 18407947. The next prime is 18407993. The reversal of 18407968 is 86970481.

It can be written as a sum of positive squares in only one way, i.e., 17539344 + 868624 = 4188^2 + 932^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287593 + ... + 287656.

Almost surely, 2^18407968 is an apocalyptic number.

It is an amenable number.

18407968 is a deficient number, since it is larger than the sum of its proper divisors (17832782).

18407968 is an equidigital number, since it uses as much as digits as its factorization.

18407968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575259 (or 575251 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 18407968 is about 4290.4507921662. The cubic root of 18407968 is about 264.0393268625.

The spelling of 18407968 in words is "eighteen million, four hundred seven thousand, nine hundred sixty-eight".