18885825 has 72 divisors (see below), whose sum is σ = 40428960. Its totient is φ = 8618400.

The previous prime is 18885781. The next prime is 18885833. The reversal of 18885825 is 52858881.

It is not a de Polignac number, because 18885825 - 2⁸ = 18885569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 32790 + ... + 33360.

Almost surely, 2^18885825 is an apocalyptic number.

18885825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18885825 is an abundant number, since it is smaller than the sum of its proper divisors (21543135).

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

18885825 is a wasteful number, since it uses less digits than its factorization.

18885825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 586 counting only the distinct ones).

The product of its digits is 204800, while the sum is 45.

The square root of 18885825 is about 4345.7824381807. The cubic root of 18885825 is about 266.3045910675.

The spelling of 18885825 in words is "eighteen million, eight hundred eighty-five thousand, eight hundred twenty-five".