18113171 has 4 divisors (see below), whose sum is σ = 18135600. Its totient is φ = 18090744.

The previous prime is 18113159. The next prime is 18113203. The reversal of 18113171 is 17131181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17131181 = 59 ⋅290359.

It is a cyclic number.

It is not a de Polignac number, because 18113171 - 2⁶ = 18113107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18113111) 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, 9956 + ... + 11633.

It is an arithmetic number, because the mean of its divisors is an integer number (4533900).

Almost surely, 2^18113171 is an apocalyptic number.

18113171 is a deficient number, since it is larger than the sum of its proper divisors (22429).

18113171 is an equidigital number, since it uses as much as digits as its factorization.

18113171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22428.

The product of its digits is 168, while the sum is 23.

The square root of 18113171 is about 4255.9571191449. The cubic root of 18113171 is about 262.6222366452.

The spelling of 18113171 in words is "eighteen million, one hundred thirteen thousand, one hundred seventy-one".