18329 has 2 divisors, whose sum is σ = 18330. Its totient is φ = 18328.

The previous prime is 18313. The next prime is 18341. The reversal of 18329 is 92381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15625 + 2704 = 125^2 + 52^2 .

It is an emirp because it is prime and its reverse (92381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18329 - 2⁴ = 18313 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 15 and base 16.

It is not a weakly prime, because it can be changed into another prime (18379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9164 + 9165.

It is an arithmetic number, because the mean of its divisors is an integer number (9165).

2¹⁸³²⁹ is an apocalyptic number.

It is an amenable number.

18329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18329 is an equidigital number, since it uses as much as digits as its factorization.

18329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 18329 is about 135.3846372378. The cubic root of 18329 is about 26.3661219867.

It can be divided in two parts, 183 and 29, that added together give a palindrome (212).

The spelling of 18329 in words is "eighteen thousand, three hundred twenty-nine".