18231163 has 4 divisors (see below), whose sum is σ = 18249408. Its totient is φ = 18212920.

The previous prime is 18231151. The next prime is 18231179. The reversal of 18231163 is 36113281.

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 18231163 - 2¹⁷ = 18100091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18231113) 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, 7531 + ... + 9652.

It is an arithmetic number, because the mean of its divisors is an integer number (4562352).

Almost surely, 2^18231163 is an apocalyptic number.

18231163 is a deficient number, since it is larger than the sum of its proper divisors (18245).

18231163 is a wasteful number, since it uses less digits than its factorization.

18231163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18244.

The product of its digits is 864, while the sum is 25.

The square root of 18231163 is about 4269.7965993710. The cubic root of 18231163 is about 263.1912568349.

The spelling of 18231163 in words is "eighteen million, two hundred thirty-one thousand, one hundred sixty-three".