19980574793 has 6 divisors (see below), whose sum is σ = 21225039966. Its totient is φ = 18805246592.

The previous prime is 19980574771. The next prime is 19980574829. The reversal of 19980574793 is 39747508991.

It can be written as a sum of positive squares in 3 ways, for example, as 3980095744 + 16000479049 = 63088^2 + 126493^2 .

It is not a de Polignac number, because 19980574793 - 2³⁰ = 18906832969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19980570793) 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 5 ways as a sum of consecutive naturals, for example, 34568180 + ... + 34568757.

It is an arithmetic number, because the mean of its divisors is an integer number (3537506661).

Almost surely, 2^19980574793 is an apocalyptic number.

It is an amenable number.

19980574793 is a deficient number, since it is larger than the sum of its proper divisors (1244465173).

19980574793 is an equidigital number, since it uses as much as digits as its factorization.

19980574793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69136971 (or 69136954 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 19980574793 in words is "nineteen billion, nine hundred eighty million, five hundred seventy-four thousand, seven hundred ninety-three".