18397163 has 8 divisors (see below), whose sum is σ = 19227648. Its totient is φ = 17585064.

The previous prime is 18397157. The next prime is 18397193. The reversal of 18397163 is 36179381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18397163 - 2²⁰ = 17348587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18397123) 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, 2531 + ... + 6572.

It is an arithmetic number, because the mean of its divisors is an integer number (2403456).

Almost surely, 2^18397163 is an apocalyptic number.

18397163 is a deficient number, since it is larger than the sum of its proper divisors (830485).

18397163 is an equidigital number, since it uses as much as digits as its factorization.

18397163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9193.

The product of its digits is 27216, while the sum is 38.

The square root of 18397163 is about 4289.1914156400. The cubic root of 18397163 is about 263.9876553380.

The spelling of 18397163 in words is "eighteen million, three hundred ninety-seven thousand, one hundred sixty-three".