18068408279 has 2 divisors, whose sum is σ = 18068408280. Its totient is φ = 18068408278.

The previous prime is 18068408261. The next prime is 18068408377. The reversal of 18068408279 is 97280486081.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18068408279 - 2²⁴ = 18051631063 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18068408279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18068408879) 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, 9034204139 + 9034204140.

It is an arithmetic number, because the mean of its divisors is an integer number (9034204140).

Almost surely, 2^18068408279 is an apocalyptic number.

18068408279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18068408279 is an equidigital number, since it uses as much as digits as its factorization.

18068408279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 18068408279 in words is "eighteen billion, sixty-eight million, four hundred eight thousand, two hundred seventy-nine".