18316625 has 24 divisors (see below), whose sum is σ = 23982504. Its totient is φ = 13965600.

The previous prime is 18316621. The next prime is 18316631. The reversal of 18316625 is 52661381.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2666689 + 15649936 = 1633^2 + 3956^2 .

It is not a de Polignac number, because 18316625 - 2² = 18316621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18316591 and 18316600.

It is not an unprimeable number, because it can be changed into a prime (18316621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65987 + ... + 66263.

It is an arithmetic number, because the mean of its divisors is an integer number (999271).

Almost surely, 2^18316625 is an apocalyptic number.

It is an amenable number.

18316625 is a deficient number, since it is larger than the sum of its proper divisors (5665879).

18316625 is an equidigital number, since it uses as much as digits as its factorization.

18316625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 305 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 18316625 is about 4279.7926351635. The cubic root of 18316625 is about 263.6018687077.

The spelling of 18316625 in words is "eighteen million, three hundred sixteen thousand, six hundred twenty-five".