18445975 has 12 divisors (see below), whose sum is σ = 22997536. Its totient is φ = 14676480.

The previous prime is 18445967. The next prime is 18445981. The reversal of 18445975 is 57954481.

It is not a de Polignac number, because 18445975 - 2³ = 18445967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2914 + ... + 6736.

Almost surely, 2^18445975 is an apocalyptic number.

18445975 is a deficient number, since it is larger than the sum of its proper divisors (4551561).

18445975 is a wasteful number, since it uses less digits than its factorization.

18445975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026 (or 4021 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 18445975 is about 4294.8777631034. The cubic root of 18445975 is about 264.2209229325.

The spelling of 18445975 in words is "eighteen million, four hundred forty-five thousand, nine hundred seventy-five".