18134139 has 4 divisors (see below), whose sum is σ = 24178856. Its totient is φ = 12089424.

The previous prime is 18134131. The next prime is 18134147. The reversal of 18134139 is 93143181.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (18134131) and next prime (18134147).

It is not a de Polignac number, because 18134139 - 2³ = 18134131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18134131) 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 3 ways as a sum of consecutive naturals, for example, 3022354 + ... + 3022359.

It is an arithmetic number, because the mean of its divisors is an integer number (6044714).

Almost surely, 2^18134139 is an apocalyptic number.

18134139 is a deficient number, since it is larger than the sum of its proper divisors (6044717).

18134139 is an equidigital number, since it uses as much as digits as its factorization.

18134139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6044716.

The product of its digits is 2592, while the sum is 30.

The square root of 18134139 is about 4258.4197773352. The cubic root of 18134139 is about 262.7235356680.

The spelling of 18134139 in words is "eighteen million, one hundred thirty-four thousand, one hundred thirty-nine".