18813559339 has 4 divisors (see below), whose sum is σ = 19078539120. Its totient is φ = 18548579560.

The previous prime is 18813559309. The next prime is 18813559357. The reversal of 18813559339 is 93395531881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93395531881 = 238991 ⋅390791.

It is a cyclic number.

It is not a de Polignac number, because 18813559339 - 2⁵ = 18813559307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18813559339.

It is not an unprimeable number, because it can be changed into a prime (18813559309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132489784 + ... + 132489925.

It is an arithmetic number, because the mean of its divisors is an integer number (4769634780).

Almost surely, 2^18813559339 is an apocalyptic number.

18813559339 is a deficient number, since it is larger than the sum of its proper divisors (264979781).

18813559339 is an equidigital number, since it uses as much as digits as its factorization.

18813559339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264979780.

The product of its digits is 3499200, while the sum is 55.

The spelling of 18813559339 in words is "eighteen billion, eight hundred thirteen million, five hundred fifty-nine thousand, three hundred thirty-nine".