18104139 has 12 divisors (see below), whose sum is σ = 26343096. Its totient is φ = 11980512.

The previous prime is 18104123. The next prime is 18104143. The reversal of 18104139 is 93140181.

It is not a de Polignac number, because 18104139 - 2⁴ = 18104123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18104159) 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 11 ways as a sum of consecutive naturals, for example, 6109 + ... + 8574.

It is an arithmetic number, because the mean of its divisors is an integer number (2195258).

Almost surely, 2^18104139 is an apocalyptic number.

18104139 is a deficient number, since it is larger than the sum of its proper divisors (8238957).

18104139 is a wasteful number, since it uses less digits than its factorization.

18104139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14826 (or 14823 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 18104139 is about 4254.8958859178. The cubic root of 18104139 is about 262.5785778364.

The spelling of 18104139 in words is "eighteen million, one hundred four thousand, one hundred thirty-nine".