18113 has 4 divisors (see below), whose sum is σ = 18480. Its totient is φ = 17748.

The previous prime is 18097. The next prime is 18119. The reversal of 18113 is 31181.

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 18113 - 2⁴ = 18097 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11 and base 15.

It is not an unprimeable number, because it can be changed into a prime (18119) 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, 95 + ... + 212.

It is an arithmetic number, because the mean of its divisors is an integer number (4620).

2¹⁸¹¹³ is an apocalyptic number.

It is an amenable number.

18113 is a deficient number, since it is larger than the sum of its proper divisors (367).

18113 is an equidigital number, since it uses as much as digits as its factorization.

18113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366.

The product of its digits is 24, while the sum is 14.

The square root of 18113 is about 134.5845459182. The cubic root of 18113 is about 26.2621410202.

Adding to 18113 its reverse (31181), we get a palindrome (49294).

It can be divided in two parts, 18 and 113, that added together give a palindrome (131).

The spelling of 18113 in words is "eighteen thousand, one hundred thirteen".