19938079339 has 4 divisors (see below), whose sum is σ = 20009033640. Its totient is φ = 19867125040.

The previous prime is 19938079327. The next prime is 19938079351. The reversal of 19938079339 is 93397083991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93397083991 = 31 ⋅3012809161.

It is an interprime number because it is at equal distance from previous prime (19938079327) and next prime (19938079351).

It is a cyclic number.

It is not a de Polignac number, because 19938079339 - 2¹⁹ = 19937555051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19938079439) 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, 35476729 + ... + 35477290.

It is an arithmetic number, because the mean of its divisors is an integer number (5002258410).

Almost surely, 2^19938079339 is an apocalyptic number.

19938079339 is a deficient number, since it is larger than the sum of its proper divisors (70954301).

19938079339 is an equidigital number, since it uses as much as digits as its factorization.

19938079339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70954300.

The product of its (nonzero) digits is 9920232, while the sum is 61.

The spelling of 19938079339 in words is "nineteen billion, nine hundred thirty-eight million, seventy-nine thousand, three hundred thirty-nine".