18168525 has 18 divisors (see below), whose sum is σ = 32542250. Its totient is φ = 9689760.

The previous prime is 18168523. The next prime is 18168533. The reversal of 18168525 is 52586181.

It can be written as a sum of positive squares in 3 ways, for example, as 4485924 + 13682601 = 2118^2 + 3699^2 .

It is not a de Polignac number, because 18168525 - 2¹ = 18168523 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18168525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18168523) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 40150 + ... + 40599.

Almost surely, 2^18168525 is an apocalyptic number.

18168525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18168525 is a deficient number, since it is larger than the sum of its proper divisors (14373725).

18168525 is a wasteful number, since it uses less digits than its factorization.

18168525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80765 (or 80757 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 18168525 is about 4262.4552783578. The cubic root of 18168525 is about 262.8894898278.

The spelling of 18168525 in words is "eighteen million, one hundred sixty-eight thousand, five hundred twenty-five".