19343536939 has 4 divisors (see below), whose sum is σ = 19424472480. Its totient is φ = 19262601400.

The previous prime is 19343536931. The next prime is 19343536963. The reversal of 19343536939 is 93963534391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93963534391 = 23593 ⋅3982687.

It is a cyclic number.

It is not a de Polignac number, because 19343536939 - 2³ = 19343536931 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 19343536939.

It is not an unprimeable number, because it can be changed into a prime (19343536931) 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, 40467412 + ... + 40467889.

It is an arithmetic number, because the mean of its divisors is an integer number (4856118120).

Almost surely, 2^19343536939 is an apocalyptic number.

19343536939 is a deficient number, since it is larger than the sum of its proper divisors (80935541).

19343536939 is an equidigital number, since it uses as much as digits as its factorization.

19343536939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80935540.

The product of its digits is 7085880, while the sum is 55.

The spelling of 19343536939 in words is "nineteen billion, three hundred forty-three million, five hundred thirty-six thousand, nine hundred thirty-nine".