18319831379 has 2 divisors, whose sum is σ = 18319831380. Its totient is φ = 18319831378.

The previous prime is 18319831337. The next prime is 18319831399. The reversal of 18319831379 is 97313891381.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18319831379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18319831379.

It is not a weakly prime, because it can be changed into another prime (18319831319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159915689 + 9159915690.

It is an arithmetic number, because the mean of its divisors is an integer number (9159915690).

Almost surely, 2^18319831379 is an apocalyptic number.

18319831379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18319831379 is an equidigital number, since it uses as much as digits as its factorization.

18319831379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The spelling of 18319831379 in words is "eighteen billion, three hundred nineteen million, eight hundred thirty-one thousand, three hundred seventy-nine".