18173062057 has 2 divisors, whose sum is σ = 18173062058. Its totient is φ = 18173062056.

The previous prime is 18173062009. The next prime is 18173062073. The reversal of 18173062057 is 75026037181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17725993321 + 447068736 = 133139^2 + 21144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18173062057 is a prime.

It is the 134808-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (18173062087) by changing a digit.

It is a nontrivial repunit in base 134807.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9086531028 + 9086531029.

It is an arithmetic number, because the mean of its divisors is an integer number (9086531029).

Almost surely, 2^18173062057 is an apocalyptic number.

It is an amenable number.

18173062057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18173062057 is an equidigital number, since it uses as much as digits as its factorization.

18173062057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 18173062057 in words is "eighteen billion, one hundred seventy-three million, sixty-two thousand, fifty-seven".