18138183 has 16 divisors (see below), whose sum is σ = 28204800. Its totient is φ = 10364088.

The previous prime is 18138161. The next prime is 18138187. The reversal of 18138183 is 38183181.

It is not a de Polignac number, because 18138183 - 2⁶ = 18138119 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18138187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7785 + ... + 9842.

It is an arithmetic number, because the mean of its divisors is an integer number (1762800).

Almost surely, 2^18138183 is an apocalyptic number.

18138183 is a deficient number, since it is larger than the sum of its proper divisors (10066617).

18138183 is an equidigital number, since it uses as much as digits as its factorization.

18138183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17651 (or 17637 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 18138183 is about 4258.8945748868. The cubic root of 18138183 is about 262.7430637528.

The spelling of 18138183 in words is "eighteen million, one hundred thirty-eight thousand, one hundred eighty-three".