18195163 has 16 divisors (see below), whose sum is σ = 21274624. Its totient is φ = 15240960.

The previous prime is 18195161. The next prime is 18195169. The reversal of 18195163 is 36159181.

It is not a de Polignac number, because 18195163 - 2¹ = 18195161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18195161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86128 + ... + 86338.

It is an arithmetic number, because the mean of its divisors is an integer number (1329664).

Almost surely, 2^18195163 is an apocalyptic number.

18195163 is a deficient number, since it is larger than the sum of its proper divisors (3079461).

18195163 is a wasteful number, since it uses less digits than its factorization.

18195163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its digits is 6480, while the sum is 34.

The square root of 18195163 is about 4265.5788587248. The cubic root of 18195163 is about 263.0179066104.

The spelling of 18195163 in words is "eighteen million, one hundred ninety-five thousand, one hundred sixty-three".