18139164 has 12 divisors (see below), whose sum is σ = 42324744. Its totient is φ = 6046384.

The previous prime is 18139159. The next prime is 18139171. The reversal of 18139164 is 46193181.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755787 + ... + 755810.

It is an arithmetic number, because the mean of its divisors is an integer number (3527062).

Almost surely, 2^18139164 is an apocalyptic number.

It is an amenable number.

18139164 is an abundant number, since it is smaller than the sum of its proper divisors (24185580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18139164 is a wasteful number, since it uses less digits than its factorization.

18139164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511604 (or 1511602 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 18139164 is about 4259.0097440602. The cubic root of 18139164 is about 262.7478004694.

The spelling of 18139164 in words is "eighteen million, one hundred thirty-nine thousand, one hundred sixty-four".