19772931768 has 32 divisors (see below), whose sum is σ = 49759704960. Its totient is φ = 6547327200.

The previous prime is 19772931751. The next prime is 19772931817. The reversal of 19772931768 is 86713927791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2724430 + ... + 2731677.

It is an arithmetic number, because the mean of its divisors is an integer number (1554990780).

Almost surely, 2^19772931768 is an apocalyptic number.

It is an amenable number.

19772931768 is an abundant number, since it is smaller than the sum of its proper divisors (29986773192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19772931768 is a wasteful number, since it uses less digits than its factorization.

19772931768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456267 (or 5456263 counting only the distinct ones).

The product of its digits is 8001504, while the sum is 60.

The spelling of 19772931768 in words is "nineteen billion, seven hundred seventy-two million, nine hundred thirty-one thousand, seven hundred sixty-eight".