18004087 has 8 divisors (see below), whose sum is σ = 18645120. Its totient is φ = 17366880.

The previous prime is 18004081. The next prime is 18004121. The reversal of 18004087 is 78040081.

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 18004087 - 2²³ = 9615479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18004081) 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 7 ways as a sum of consecutive naturals, for example, 11313 + ... + 12805.

It is an arithmetic number, because the mean of its divisors is an integer number (2330640).

Almost surely, 2^18004087 is an apocalyptic number.

18004087 is a deficient number, since it is larger than the sum of its proper divisors (641033).

18004087 is a wasteful number, since it uses less digits than its factorization.

18004087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 18004087 is about 4243.1223173508. The cubic root of 18004087 is about 262.0939730496.

The spelling of 18004087 in words is "eighteen million, four thousand, eighty-seven".