18986867167 has 2 divisors, whose sum is σ = 18986867168. Its totient is φ = 18986867166.

The previous prime is 18986867147. The next prime is 18986867171. The reversal of 18986867167 is 76176868981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18986867167 is a prime.

It is a super-2 number, since 2×18986867167² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18986867147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9493433583 + 9493433584.

It is an arithmetic number, because the mean of its divisors is an integer number (9493433584).

Almost surely, 2^18986867167 is an apocalyptic number.

18986867167 is a deficient number, since it is larger than the sum of its proper divisors (1).

18986867167 is an equidigital number, since it uses as much as digits as its factorization.

18986867167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 67.

The spelling of 18986867167 in words is "eighteen billion, nine hundred eighty-six million, eight hundred sixty-seven thousand, one hundred sixty-seven".