18004165 has 8 divisors (see below), whose sum is σ = 21738528. Its totient is φ = 14314320.

The previous prime is 18004121. The next prime is 18004171. The reversal of 18004165 is 56140081.

18004165 = 248² + 249² + ... + 410².

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

It is a de Polignac number, because none of the positive numbers 2^k-18004165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10231 + ... + 11860.

It is an arithmetic number, because the mean of its divisors is an integer number (2717316).

Almost surely, 2^18004165 is an apocalyptic number.

It is an amenable number.

18004165 is a deficient number, since it is larger than the sum of its proper divisors (3734363).

18004165 is a wasteful number, since it uses less digits than its factorization.

18004165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22259.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 18004165 is about 4243.1315086855. The cubic root of 18004165 is about 262.0943515433.

The spelling of 18004165 in words is "eighteen million, four thousand, one hundred sixty-five".