18004665 has 16 divisors (see below), whose sum is σ = 32923008. Its totient is φ = 8230656.

The previous prime is 18004661. The next prime is 18004673. The reversal of 18004665 is 56640081.

It is not a de Polignac number, because 18004665 - 2² = 18004661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18004661) 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 15 ways as a sum of consecutive naturals, for example, 85632 + ... + 85841.

It is an arithmetic number, because the mean of its divisors is an integer number (2057688).

Almost surely, 2^18004665 is an apocalyptic number.

18004665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18004665 is a deficient number, since it is larger than the sum of its proper divisors (14918343).

18004665 is a wasteful number, since it uses less digits than its factorization.

18004665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171488.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 18004665 is about 4243.1904270254. The cubic root of 18004665 is about 262.0967777590.

The spelling of 18004665 in words is "eighteen million, four thousand, six hundred sixty-five".