18700957789 has 2 divisors, whose sum is σ = 18700957790. Its totient is φ = 18700957788.

The previous prime is 18700957787. The next prime is 18700957811. The reversal of 18700957789 is 98775900781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11891902500 + 6809055289 = 109050^2 + 82517^2 .

It is a cyclic number.

It is not a de Polignac number, because 18700957789 - 2¹ = 18700957787 is a prime.

Together with 18700957787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18700957787) by changing a digit.

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, 9350478894 + 9350478895.

It is an arithmetic number, because the mean of its divisors is an integer number (9350478895).

Almost surely, 2^18700957789 is an apocalyptic number.

It is an amenable number.

18700957789 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700957789 is an equidigital number, since it uses as much as digits as its factorization.

18700957789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 61.

The spelling of 18700957789 in words is "eighteen billion, seven hundred million, nine hundred fifty-seven thousand, seven hundred eighty-nine".