18263931339 has 4 divisors (see below), whose sum is σ = 24351908456. Its totient is φ = 12175954224.

The previous prime is 18263931337. The next prime is 18263931349. The reversal of 18263931339 is 93313936281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93313936281 = 3 ⋅31104645427.

It is not a de Polignac number, because 18263931339 - 2¹ = 18263931337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18263931337) 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 in 3 ways as a sum of consecutive naturals, for example, 3043988554 + ... + 3043988559.

It is an arithmetic number, because the mean of its divisors is an integer number (6087977114).

Almost surely, 2^18263931339 is an apocalyptic number.

18263931339 is a deficient number, since it is larger than the sum of its proper divisors (6087977117).

18263931339 is an equidigital number, since it uses as much as digits as its factorization.

18263931339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6087977116.

The product of its digits is 629856, while the sum is 48.

The spelling of 18263931339 in words is "eighteen billion, two hundred sixty-three million, nine hundred thirty-one thousand, three hundred thirty-nine".