19968266195 has 8 divisors (see below), whose sum is σ = 23977181520. Its totient is φ = 15964438240.

The previous prime is 19968266173. The next prime is 19968266233. The reversal of 19968266195 is 59166286991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19968266195 - 2⁸ = 19968265939 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1263200 + ... + 1278909.

It is an arithmetic number, because the mean of its divisors is an integer number (2997147690).

Almost surely, 2^19968266195 is an apocalyptic number.

19968266195 is a deficient number, since it is larger than the sum of its proper divisors (4008915325).

19968266195 is a wasteful number, since it uses less digits than its factorization.

19968266195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543685.

The product of its digits is 12597120, while the sum is 62.

The spelling of 19968266195 in words is "nineteen billion, nine hundred sixty-eight million, two hundred sixty-six thousand, one hundred ninety-five".