18324138 has 24 divisors (see below), whose sum is σ = 42632352. Its totient is φ = 5235384.

The previous prime is 18324101. The next prime is 18324179. The reversal of 18324138 is 83142381.

It is a plaindrome in base 16.

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, 30870 + ... + 31457.

It is an arithmetic number, because the mean of its divisors is an integer number (1776348).

Almost surely, 2^18324138 is an apocalyptic number.

18324138 is an abundant number, since it is smaller than the sum of its proper divisors (24308214).

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

18324138 is a wasteful number, since it uses less digits than its factorization.

18324138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62346 (or 62339 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 18324138 is about 4280.6702746182. The cubic root of 18324138 is about 263.6379046427.

The spelling of 18324138 in words is "eighteen million, three hundred twenty-four thousand, one hundred thirty-eight".