19039931647 has 24 divisors (see below), whose sum is σ = 21541190720. Its totient is φ = 16809249600.

The previous prime is 19039931641. The next prime is 19039931707. The reversal of 19039931647 is 74613993091.

It is a de Polignac number, because none of the positive numbers 2^k-19039931647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19039931594 and 19039931603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19039931641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 566773 + ... + 599425.

Almost surely, 2^19039931647 is an apocalyptic number.

19039931647 is a deficient number, since it is larger than the sum of its proper divisors (2501259073).

19039931647 is a wasteful number, since it uses less digits than its factorization.

19039931647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32815 (or 32804 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 19039931647 in words is "nineteen billion, thirty-nine million, nine hundred thirty-one thousand, six hundred forty-seven".