18939926711 has 2 divisors, whose sum is σ = 18939926712. Its totient is φ = 18939926710.

The previous prime is 18939926659. The next prime is 18939926743. The reversal of 18939926711 is 11762993981.

It is a strong prime.

It is an emirp because it is prime and its reverse (11762993981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18939926711 - 2³⁴ = 1760057527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18939926791) 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, 9469963355 + 9469963356.

It is an arithmetic number, because the mean of its divisors is an integer number (9469963356).

Almost surely, 2^18939926711 is an apocalyptic number.

18939926711 is a deficient number, since it is larger than the sum of its proper divisors (1).

18939926711 is an equidigital number, since it uses as much as digits as its factorization.

18939926711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 56.

The spelling of 18939926711 in words is "eighteen billion, nine hundred thirty-nine million, nine hundred twenty-six thousand, seven hundred eleven".