18388125 has 60 divisors (see below), whose sum is σ = 38012832. Its totient is φ = 8388000.

The previous prime is 18388103. The next prime is 18388129. The reversal of 18388125 is 52188381.

It is not a de Polignac number, because 18388125 - 2⁹ = 18387613 is a prime.

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 18388125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18388129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 39142 + ... + 39608.

Almost surely, 2^18388125 is an apocalyptic number.

18388125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18388125 is an abundant number, since it is smaller than the sum of its proper divisors (19624707).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18388125 is an equidigital number, since it uses as much as digits as its factorization.

18388125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 482 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 18388125 is about 4288.1377076768. The cubic root of 18388125 is about 263.9444183953.

The spelling of 18388125 in words is "eighteen million, three hundred eighty-eight thousand, one hundred twenty-five".