18107562173 has 2 divisors, whose sum is σ = 18107562174. Its totient is φ = 18107562172.

The previous prime is 18107562149. The next prime is 18107562217. The reversal of 18107562173 is 37126570181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14738688409 + 3368873764 = 121403^2 + 58042^2 .

It is a cyclic number.

It is not a de Polignac number, because 18107562173 - 2¹⁴ = 18107545789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18107562173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18107562103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053781086 + 9053781087.

It is an arithmetic number, because the mean of its divisors is an integer number (9053781087).

Almost surely, 2^18107562173 is an apocalyptic number.

It is an amenable number.

18107562173 is a deficient number, since it is larger than the sum of its proper divisors (1).

18107562173 is an equidigital number, since it uses as much as digits as its factorization.

18107562173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 18107562173 in words is "eighteen billion, one hundred seven million, five hundred sixty-two thousand, one hundred seventy-three".