18407964 has 24 divisors (see below), whose sum is σ = 43021440. Its totient is φ = 6126064.

The previous prime is 18407947. The next prime is 18407993. The reversal of 18407964 is 46970481.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13297 + ... + 14615.

It is an arithmetic number, because the mean of its divisors is an integer number (1792560).

Almost surely, 2^18407964 is an apocalyptic number.

It is an amenable number.

18407964 is an abundant number, since it is smaller than the sum of its proper divisors (24613476).

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

18407964 is a wasteful number, since it uses less digits than its factorization.

18407964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489 (or 2487 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 18407964 is about 4290.4503260147. The cubic root of 18407964 is about 264.0393077375.

The spelling of 18407964 in words is "eighteen million, four hundred seven thousand, nine hundred sixty-four".