19279393139 has 4 divisors (see below), whose sum is σ = 19279875120. Its totient is φ = 19278911160.

The previous prime is 19279393033. The next prime is 19279393151. The reversal of 19279393139 is 93139397291.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19279393139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19279390139) 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, 174959 + ... + 263000.

It is an arithmetic number, because the mean of its divisors is an integer number (4819968780).

Almost surely, 2^19279393139 is an apocalyptic number.

19279393139 is a deficient number, since it is larger than the sum of its proper divisors (481981).

19279393139 is an equidigital number, since it uses as much as digits as its factorization.

19279393139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481980.

The product of its digits is 2480058, while the sum is 56.

The spelling of 19279393139 in words is "nineteen billion, two hundred seventy-nine million, three hundred ninety-three thousand, one hundred thirty-nine".