18004327 has 4 divisors (see below), whose sum is σ = 19641096. Its totient is φ = 16367560.

The previous prime is 18004321. The next prime is 18004367. The reversal of 18004327 is 72340081.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18004327 - 2³ = 18004319 is a prime.

It is a Duffinian number.

It is a partition number, being equal to the number of ways a set of 81 identical objects can be partitioned into subset.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18004321) 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 3 ways as a sum of consecutive naturals, for example, 818368 + ... + 818389.

It is an arithmetic number, because the mean of its divisors is an integer number (4910274).

Almost surely, 2^18004327 is an apocalyptic number.

18004327 is a deficient number, since it is larger than the sum of its proper divisors (1636769).

18004327 is a wasteful number, since it uses less digits than its factorization.

18004327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636768.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 18004327 is about 4243.1505983172. The cubic root of 18004327 is about 262.0951376421.

The spelling of 18004327 in words is "eighteen million, four thousand, three hundred twenty-seven".