18106368113 has 2 divisors, whose sum is σ = 18106368114. Its totient is φ = 18106368112.

The previous prime is 18106368083. The next prime is 18106368187. The reversal of 18106368113 is 31186360181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14029928704 + 4076439409 = 118448^2 + 63847^2 .

It is an emirp because it is prime and its reverse (31186360181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18106368113 - 2²² = 18102173809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18106368713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053184056 + 9053184057.

It is an arithmetic number, because the mean of its divisors is an integer number (9053184057).

Almost surely, 2^18106368113 is an apocalyptic number.

It is an amenable number.

18106368113 is a deficient number, since it is larger than the sum of its proper divisors (1).

18106368113 is an equidigital number, since it uses as much as digits as its factorization.

18106368113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 18106368113 in words is "eighteen billion, one hundred six million, three hundred sixty-eight thousand, one hundred thirteen".