18799728139 has 2 divisors, whose sum is σ = 18799728140. Its totient is φ = 18799728138.

The previous prime is 18799728053. The next prime is 18799728149. The reversal of 18799728139 is 93182799781.

It is a strong prime.

It is an emirp because it is prime and its reverse (93182799781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18799728139 - 2³¹ = 16652244491 is a prime.

It is not a weakly prime, because it can be changed into another prime (18799728149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9399864069 + 9399864070.

It is an arithmetic number, because the mean of its divisors is an integer number (9399864070).

Almost surely, 2^18799728139 is an apocalyptic number.

18799728139 is a deficient number, since it is larger than the sum of its proper divisors (1).

18799728139 is an equidigital number, since it uses as much as digits as its factorization.

18799728139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 64.

The spelling of 18799728139 in words is "eighteen billion, seven hundred ninety-nine million, seven hundred twenty-eight thousand, one hundred thirty-nine".