18117163 has 4 divisors (see below), whose sum is σ = 18184288. Its totient is φ = 18050040.

The previous prime is 18117119. The next prime is 18117167. The reversal of 18117163 is 36171181.

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 18117163 - 2¹³ = 18108971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18117167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33156 + ... + 33697.

It is an arithmetic number, because the mean of its divisors is an integer number (4546072).

Almost surely, 2^18117163 is an apocalyptic number.

18117163 is a deficient number, since it is larger than the sum of its proper divisors (67125).

18117163 is an equidigital number, since it uses as much as digits as its factorization.

18117163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67124.

The product of its digits is 1008, while the sum is 28.

The square root of 18117163 is about 4256.4260829950. The cubic root of 18117163 is about 262.6415285178.

The spelling of 18117163 in words is "eighteen million, one hundred seventeen thousand, one hundred sixty-three".