19968601917 has 16 divisors (see below), whose sum is σ = 29067289920. Its totient is φ = 12092995200.

The previous prime is 19968601907. The next prime is 19968601921. The reversal of 19968601917 is 71910686991.

It is not a de Polignac number, because 19968601917 - 2¹⁵ = 19968569149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19968601907) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 185442 + ... + 272627.

It is an arithmetic number, because the mean of its divisors is an integer number (1816705620).

Almost surely, 2^19968601917 is an apocalyptic number.

It is an amenable number.

19968601917 is a deficient number, since it is larger than the sum of its proper divisors (9098688003).

19968601917 is a wasteful number, since it uses less digits than its factorization.

19968601917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459404.

The product of its (nonzero) digits is 1469664, while the sum is 57.

The spelling of 19968601917 in words is "nineteen billion, nine hundred sixty-eight million, six hundred one thousand, nine hundred seventeen".