18318625 has 16 divisors (see below), whose sum is σ = 24622416. Its totient is φ = 13526400.

The previous prime is 18318623. The next prime is 18318659. The reversal of 18318625 is 52681381.

It can be written as a sum of positive squares in 8 ways, for example, as 11785489 + 6533136 = 3433^2 + 2556^2 .

It is not a de Polignac number, because 18318625 - 2¹ = 18318623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18318623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4012 + ... + 7261.

It is an arithmetic number, because the mean of its divisors is an integer number (1538901).

Almost surely, 2^18318625 is an apocalyptic number.

It is an amenable number.

18318625 is a deficient number, since it is larger than the sum of its proper divisors (6303791).

18318625 is a wasteful number, since it uses less digits than its factorization.

18318625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11301 (or 11291 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 18318625 is about 4280.0262849660. The cubic root of 18318625 is about 263.6114626249.

The spelling of 18318625 in words is "eighteen million, three hundred eighteen thousand, six hundred twenty-five".