18163161 has 12 divisors (see below), whose sum is σ = 26275392. Its totient is φ = 12090456.

The previous prime is 18163151. The next prime is 18163163. The reversal of 18163161 is 16136181.

It is not a de Polignac number, because 18163161 - 2²¹ = 16066009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18163163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7660 + ... + 9746.

It is an arithmetic number, because the mean of its divisors is an integer number (2189616).

Almost surely, 2^18163161 is an apocalyptic number.

It is an amenable number.

18163161 is a deficient number, since it is larger than the sum of its proper divisors (8112231).

18163161 is a wasteful number, since it uses less digits than its factorization.

18163161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060 (or 3057 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 18163161 is about 4261.8260170964. The cubic root of 18163161 is about 262.8636158136.

The spelling of 18163161 in words is "eighteen million, one hundred sixty-three thousand, one hundred sixty-one".