19968605895 has 64 divisors (see below), whose sum is σ = 37460745216. Its totient is φ = 8894638080.

The previous prime is 19968605851. The next prime is 19968605903. The reversal of 19968605895 is 59850686991.

It is not a de Polignac number, because 19968605895 - 2¹⁰ = 19968604871 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 670767 + ... + 699903.

It is an arithmetic number, because the mean of its divisors is an integer number (585324144).

Almost surely, 2^19968605895 is an apocalyptic number.

19968605895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19968605895 is a deficient number, since it is larger than the sum of its proper divisors (17492139321).

19968605895 is a wasteful number, since it uses less digits than its factorization.

19968605895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29320.

The product of its (nonzero) digits is 41990400, while the sum is 66.

The spelling of 19968605895 in words is "nineteen billion, nine hundred sixty-eight million, six hundred five thousand, eight hundred ninety-five".