18349 has 4 divisors (see below), whose sum is σ = 18720. Its totient is φ = 17980.

The previous prime is 18341. The next prime is 18353. The reversal of 18349 is 94381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18349 - 2³ = 18341 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 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18341) 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, 97 + ... + 214.

It is an arithmetic number, because the mean of its divisors is an integer number (4680).

2¹⁸³⁴⁹ is an apocalyptic number.

It is an amenable number.

18349 is a deficient number, since it is larger than the sum of its proper divisors (371).

18349 is an equidigital number, since it uses as much as digits as its factorization.

18349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370.

The product of its digits is 864, while the sum is 25.

The square root of 18349 is about 135.4584807238. The cubic root of 18349 is about 26.3757084481.

It can be divided in two parts, 183 and 49, that added together give a palindrome (232).

The spelling of 18349 in words is "eighteen thousand, three hundred forty-nine".