18054139 has 4 divisors (see below), whose sum is σ = 18063856. Its totient is φ = 18044424.

The previous prime is 18054137. The next prime is 18054163. The reversal of 18054139 is 93145081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18054139 - 2¹ = 18054137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18054139.

It is not an unprimeable number, because it can be changed into a prime (18054133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1104 + ... + 6109.

It is an arithmetic number, because the mean of its divisors is an integer number (4515964).

Almost surely, 2^18054139 is an apocalyptic number.

18054139 is a deficient number, since it is larger than the sum of its proper divisors (9717).

18054139 is an equidigital number, since it uses as much as digits as its factorization.

18054139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9716.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18054139 is about 4249.0162390841. The cubic root of 18054139 is about 262.3366251728.

The spelling of 18054139 in words is "eighteen million, fifty-four thousand, one hundred thirty-nine".