19568912997 has 16 divisors (see below), whose sum is σ = 26841560832. Its totient is φ = 12675156480.

The previous prime is 19568912971. The next prime is 19568912999. The reversal of 19568912997 is 79921986591.

It is not a de Polignac number, because 19568912997 - 2¹⁹ = 19568388709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19568912999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487204 + ... + 525837.

It is an arithmetic number, because the mean of its divisors is an integer number (1677597552).

Almost surely, 2^19568912997 is an apocalyptic number.

It is an amenable number.

19568912997 is a deficient number, since it is larger than the sum of its proper divisors (7272647835).

19568912997 is a wasteful number, since it uses less digits than its factorization.

19568912997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013228.

The product of its digits is 22044960, while the sum is 66.

The spelling of 19568912997 in words is "nineteen billion, five hundred sixty-eight million, nine hundred twelve thousand, nine hundred ninety-seven".