18886660907 has 2 divisors, whose sum is σ = 18886660908. Its totient is φ = 18886660906.

The previous prime is 18886660879. The next prime is 18886660909. The reversal of 18886660907 is 70906668881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18886660907 is a prime.

Together with 18886660909, 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 (18886660909) 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, 9443330453 + 9443330454.

It is an arithmetic number, because the mean of its divisors is an integer number (9443330454).

Almost surely, 2^18886660907 is an apocalyptic number.

18886660907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18886660907 is an equidigital number, since it uses as much as digits as its factorization.

18886660907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 18886660907 in words is "eighteen billion, eight hundred eighty-six million, six hundred sixty thousand, nine hundred seven".