18168136967 has 2 divisors, whose sum is σ = 18168136968. Its totient is φ = 18168136966.

The previous prime is 18168136933. The next prime is 18168136991. The reversal of 18168136967 is 76963186181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18168136967 - 2²² = 18163942663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18168136367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9084068483 + 9084068484.

It is an arithmetic number, because the mean of its divisors is an integer number (9084068484).

Almost surely, 2^18168136967 is an apocalyptic number.

18168136967 is a deficient number, since it is larger than the sum of its proper divisors (1).

18168136967 is an equidigital number, since it uses as much as digits as its factorization.

18168136967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 56.

The spelling of 18168136967 in words is "eighteen billion, one hundred sixty-eight million, one hundred thirty-six thousand, nine hundred sixty-seven".