19928991575 has 6 divisors (see below), whose sum is σ = 24711949584. Its totient is φ = 15943193240.

The previous prime is 19928991569. The next prime is 19928991581. The reversal of 19928991575 is 57519982991.

It is an interprime number because it is at equal distance from previous prime (19928991569) and next prime (19928991581).

It is not a de Polignac number, because 19928991575 - 2¹⁰ = 19928990551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 398579807 + ... + 398579856.

It is an arithmetic number, because the mean of its divisors is an integer number (4118658264).

Almost surely, 2^19928991575 is an apocalyptic number.

19928991575 is a deficient number, since it is larger than the sum of its proper divisors (4782958009).

19928991575 is an equidigital number, since it uses as much as digits as its factorization.

19928991575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797159673 (or 797159668 counting only the distinct ones).

The product of its digits is 18370800, while the sum is 65.

The spelling of 19928991575 in words is "nineteen billion, nine hundred twenty-eight million, nine hundred ninety-one thousand, five hundred seventy-five".