18108272163 has 16 divisors (see below), whose sum is σ = 25200170496. Its totient is φ = 11544529920.

The previous prime is 18108272159. The next prime is 18108272167. The reversal of 18108272163 is 36127280181.

It is an interprime number because it is at equal distance from previous prime (18108272159) and next prime (18108272167).

It is not a de Polignac number, because 18108272163 - 2² = 18108272159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18108272167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279906 + ... + 338472.

It is an arithmetic number, because the mean of its divisors is an integer number (1575010656).

Almost surely, 2^18108272163 is an apocalyptic number.

18108272163 is a deficient number, since it is larger than the sum of its proper divisors (7091898333).

18108272163 is a wasteful number, since it uses less digits than its factorization.

18108272163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63074.

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 18108272163 in words is "eighteen billion, one hundred eight million, two hundred seventy-two thousand, one hundred sixty-three".