18323 has 4 divisors (see below), whose sum is σ = 18648. Its totient is φ = 18000.

The previous prime is 18313. The next prime is 18329. The reversal of 18323 is 32381.

18323 is nontrivially palindromic in base 3.

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 18323 - 2⁴ = 18307 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 15.

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, 53 + ... + 198.

It is an arithmetic number, because the mean of its divisors is an integer number (4662).

2¹⁸³²³ is an apocalyptic number.

18323 is a deficient number, since it is larger than the sum of its proper divisors (325).

18323 is an equidigital number, since it uses as much as digits as its factorization.

18323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324.

The product of its digits is 144, while the sum is 17.

The square root of 18323 is about 135.3624763367. The cubic root of 18323 is about 26.3632446884.

The spelling of 18323 in words is "eighteen thousand, three hundred twenty-three".