18506625 has 32 divisors (see below), whose sum is σ = 32617728. Its totient is φ = 9286400.

The previous prime is 18506617. The next prime is 18506639. The reversal of 18506625 is 52660581.

It is not a de Polignac number, because 18506625 - 2³ = 18506617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4924 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (1019304).

Almost surely, 2^18506625 is an apocalyptic number.

18506625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18506625 is a deficient number, since it is larger than the sum of its proper divisors (14111103).

18506625 is a wasteful number, since it uses less digits than its factorization.

18506625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938 (or 2928 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 18506625 is about 4301.9327051919. The cubic root of 18506625 is about 264.5101905134.

The spelling of 18506625 in words is "eighteen million, five hundred six thousand, six hundred twenty-five".