18339 has 4 divisors (see below), whose sum is σ = 24456. Its totient is φ = 12224.

The previous prime is 18329. The next prime is 18341. The reversal of 18339 is 93381.

18339 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 18339 - 2⁵ = 18307 is a prime.

It is an Ulam number.

It is a D-number.

It is a plaindrome in base 15.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (18329) 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, 3054 + ... + 3059.

It is an arithmetic number, because the mean of its divisors is an integer number (6114).

2¹⁸³³⁹ is an apocalyptic number.

18339 is a deficient number, since it is larger than the sum of its proper divisors (6117).

18339 is an equidigital number, since it uses as much as digits as its factorization.

18339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116.

The product of its digits is 648, while the sum is 24.

The square root of 18339 is about 135.4215640140. The cubic root of 18339 is about 26.3709160886.

It can be divided in two parts, 183 and 39, that added together give a palindrome (222).

The spelling of 18339 in words is "eighteen thousand, three hundred thirty-nine".