18103139 has 8 divisors (see below), whose sum is σ = 19079712. Its totient is φ = 17142400.

The previous prime is 18103133. The next prime is 18103159. The reversal of 18103139 is 93130181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18103139 - 2⁴ = 18103123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18103133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1574 + ... + 6219.

It is an arithmetic number, because the mean of its divisors is an integer number (2384964).

Almost surely, 2^18103139 is an apocalyptic number.

18103139 is a deficient number, since it is larger than the sum of its proper divisors (976573).

18103139 is a wasteful number, since it uses less digits than its factorization.

18103139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7917.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 18103139 is about 4254.7783726065. The cubic root of 18103139 is about 262.5737431517.

The spelling of 18103139 in words is "eighteen million, one hundred three thousand, one hundred thirty-nine".