18758758673 has 2 divisors, whose sum is σ = 18758758674. Its totient is φ = 18758758672.

The previous prime is 18758758621. The next prime is 18758758687. The reversal of 18758758673 is 37685785781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12622073104 + 6136685569 = 112348^2 + 78337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18758758673 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 (18758758873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9379379336 + 9379379337.

It is an arithmetic number, because the mean of its divisors is an integer number (9379379337).

Almost surely, 2^18758758673 is an apocalyptic number.

It is an amenable number.

18758758673 is a deficient number, since it is larger than the sum of its proper divisors (1).

18758758673 is an equidigital number, since it uses as much as digits as its factorization.

18758758673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79027200, while the sum is 65.

The spelling of 18758758673 in words is "eighteen billion, seven hundred fifty-eight million, seven hundred fifty-eight thousand, six hundred seventy-three".