18107112173 has 2 divisors, whose sum is σ = 18107112174. Its totient is φ = 18107112172.

The previous prime is 18107112169. The next prime is 18107112187. The reversal of 18107112173 is 37121170181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13620523849 + 4486588324 = 116707^2 + 66982^2 .

It is a cyclic number.

It is not a de Polignac number, because 18107112173 - 2² = 18107112169 is a prime.

It is a super-2 number, since 2×18107112173² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18107112113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053556086 + 9053556087.

It is an arithmetic number, because the mean of its divisors is an integer number (9053556087).

Almost surely, 2^18107112173 is an apocalyptic number.

It is an amenable number.

18107112173 is a deficient number, since it is larger than the sum of its proper divisors (1).

18107112173 is an equidigital number, since it uses as much as digits as its factorization.

18107112173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 32.

The spelling of 18107112173 in words is "eighteen billion, one hundred seven million, one hundred twelve thousand, one hundred seventy-three".