18535706939 has 2 divisors, whose sum is σ = 18535706940. Its totient is φ = 18535706938.

The previous prime is 18535706911. The next prime is 18535706941. The reversal of 18535706939 is 93960753581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18535706939 - 2²⁸ = 18267271483 is a prime.

Together with 18535706941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18535706909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9267853469 + 9267853470.

It is an arithmetic number, because the mean of its divisors is an integer number (9267853470).

Almost surely, 2^18535706939 is an apocalyptic number.

18535706939 is a deficient number, since it is larger than the sum of its proper divisors (1).

18535706939 is an equidigital number, since it uses as much as digits as its factorization.

18535706939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 18535706939 in words is "eighteen billion, five hundred thirty-five million, seven hundred six thousand, nine hundred thirty-nine".