18122638163 has 16 divisors (see below), whose sum is σ = 21934978560. Its totient is φ = 14616567936.

The previous prime is 18122638151. The next prime is 18122638199. The reversal of 18122638163 is 36183622181.

It is a cyclic number.

It is not a de Polignac number, because 18122638163 - 2¹⁰ = 18122637139 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18122638163.

It is not an unprimeable number, because it can be changed into a prime (18122638103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586970 + ... + 617072.

It is an arithmetic number, because the mean of its divisors is an integer number (1370936160).

Almost surely, 2^18122638163 is an apocalyptic number.

18122638163 is a deficient number, since it is larger than the sum of its proper divisors (3812340397).

18122638163 is a wasteful number, since it uses less digits than its factorization.

18122638163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35186.

The product of its digits is 82944, while the sum is 41.

The spelling of 18122638163 in words is "eighteen billion, one hundred twenty-two million, six hundred thirty-eight thousand, one hundred sixty-three".