18044 has 12 divisors (see below), whose sum is σ = 34104. Its totient is φ = 8304.

The previous prime is 18043. The next prime is 18047. The reversal of 18044 is 44081.

It is a happy number.

18044 is nontrivially palindromic in base 3.

It is an Ulam number.

It is a plaindrome in base 9 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122 + ... + 225.

It is an arithmetic number, because the mean of its divisors is an integer number (2842).

2¹⁸⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

18044 is a deficient number, since it is larger than the sum of its proper divisors (16060).

18044 is a wasteful number, since it uses less digits than its factorization.

18044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 18044 is about 134.3279568817. The cubic root of 18044 is about 26.2287507551.

The spelling of 18044 in words is "eighteen thousand, forty-four".