18868825 has 12 divisors (see below), whose sum is σ = 23782828. Its totient is φ = 14846400.

The previous prime is 18868813. The next prime is 18868831. The reversal of 18868825 is 52886881.

It can be written as a sum of positive squares in 6 ways, for example, as 3400336 + 15468489 = 1844^2 + 3933^2 .

It is not a de Polignac number, because 18868825 - 2⁷ = 18868697 is a prime.

It is a Duffinian 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, 4662 + ... + 7711.

Almost surely, 2^18868825 is an apocalyptic number.

It is an amenable number.

18868825 is a deficient number, since it is larger than the sum of its proper divisors (4914003).

18868825 is a wasteful number, since it uses less digits than its factorization.

18868825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444 (or 12439 counting only the distinct ones).

The product of its digits is 245760, while the sum is 46.

The square root of 18868825 is about 4343.8260784705. The cubic root of 18868825 is about 266.2246627420.

The spelling of 18868825 in words is "eighteen million, eight hundred sixty-eight thousand, eight hundred twenty-five".