18700957811 has 2 divisors, whose sum is σ = 18700957812. Its totient is φ = 18700957810.

The previous prime is 18700957789. The next prime is 18700957813. The reversal of 18700957811 is 11875900781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18700957811 - 2⁶ = 18700957747 is a prime.

Together with 18700957813, 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 (18700957813) 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, 9350478905 + 9350478906.

It is an arithmetic number, because the mean of its divisors is an integer number (9350478906).

Almost surely, 2^18700957811 is an apocalyptic number.

18700957811 is a deficient number, since it is larger than the sum of its proper divisors (1).

18700957811 is an equidigital number, since it uses as much as digits as its factorization.

18700957811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 47.

The spelling of 18700957811 in words is "eighteen billion, seven hundred million, nine hundred fifty-seven thousand, eight hundred eleven".