19768917016 has 16 divisors (see below), whose sum is σ = 37271510640. Its totient is φ = 9829847520.

The previous prime is 19768917001. The next prime is 19768917017. The reversal of 19768917016 is 61071986791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19768917017) 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, 6824836 + ... + 6827731.

It is an arithmetic number, because the mean of its divisors is an integer number (2329469415).

Almost surely, 2^19768917016 is an apocalyptic number.

It is an amenable number.

19768917016 is a deficient number, since it is larger than the sum of its proper divisors (17502593624).

19768917016 is a wasteful number, since it uses less digits than its factorization.

19768917016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13652754 (or 13652750 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 19768917016 in words is "nineteen billion, seven hundred sixty-eight million, nine hundred seventeen thousand, sixteen".