19716291968 has 32 divisors (see below), whose sum is σ = 39347485320. Its totient is φ = 9840844800.

The previous prime is 19716291949. The next prime is 19716291979. The reversal of 19716291968 is 86919261791.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61793 + ... + 207968.

Almost surely, 2^19716291968 is an apocalyptic number.

It is an amenable number.

19716291968 is a deficient number, since it is larger than the sum of its proper divisors (19631193352).

19716291968 is an equidigital number, since it uses as much as digits as its factorization.

19716291968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270346 (or 270334 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 59.

The spelling of 19716291968 in words is "nineteen billion, seven hundred sixteen million, two hundred ninety-one thousand, nine hundred sixty-eight".