18363518279 has 2 divisors, whose sum is σ = 18363518280. Its totient is φ = 18363518278.

The previous prime is 18363518273. The next prime is 18363518291. The reversal of 18363518279 is 97281536381.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18363518279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18363518279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18363518273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9181759139 + 9181759140.

It is an arithmetic number, because the mean of its divisors is an integer number (9181759140).

Almost surely, 2^18363518279 is an apocalyptic number.

18363518279 is a deficient number, since it is larger than the sum of its proper divisors (1).

18363518279 is an equidigital number, since it uses as much as digits as its factorization.

18363518279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The spelling of 18363518279 in words is "eighteen billion, three hundred sixty-three million, five hundred eighteen thousand, two hundred seventy-nine".