18171 has 8 divisors (see below), whose sum is σ = 26960. Its totient is φ = 12096.

The previous prime is 18169. The next prime is 18181. The reversal of 18171 is 17181.

It is not a de Polignac number, because 18171 - 2¹ = 18169 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (18121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310 + ... + 363.

It is an arithmetic number, because the mean of its divisors is an integer number (3370).

2¹⁸¹⁷¹ is an apocalyptic number.

18171 is a deficient number, since it is larger than the sum of its proper divisors (8789).

18171 is an equidigital number, since it uses as much as digits as its factorization.

18171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 676 counting only the distinct ones).

The product of its digits is 56, while the sum is 18.

The square root of 18171 is about 134.7998516320. The cubic root of 18171 is about 26.2901426624.

Subtracting from 18171 its reverse (17181), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 181 and 71, that added together give a palindrome (252).

The spelling of 18171 in words is "eighteen thousand, one hundred seventy-one".