18320275 has 12 divisors (see below), whose sum is σ = 23913400. Its totient is φ = 13884480.

The previous prime is 18320261. The next prime is 18320311. The reversal of 18320275 is 57202381.

It is not a de Polignac number, because 18320275 - 2¹⁷ = 18189203 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18810 + ... + 19759.

Almost surely, 2^18320275 is an apocalyptic number.

18320275 is a deficient number, since it is larger than the sum of its proper divisors (5593125).

18320275 is a wasteful number, since it uses less digits than its factorization.

18320275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38598 (or 38593 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 18320275 is about 4280.2190364513. The cubic root of 18320275 is about 263.6193770809.

The spelling of 18320275 in words is "eighteen million, three hundred twenty thousand, two hundred seventy-five".