19968971008 has 36 divisors (see below), whose sum is σ = 45554219200. Its totient is φ = 8558129664.

The previous prime is 19968970999. The next prime is 19968971053. The reversal of 19968971008 is 80017986991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5569908 + ... + 5573491.

Almost surely, 2^19968971008 is an apocalyptic number.

It is an amenable number.

19968971008 is an abundant number, since it is smaller than the sum of its proper divisors (25585248192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19968971008 is an equidigital number, since it uses as much as digits as its factorization.

19968971008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11143422 (or 11143408 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 58.

The spelling of 19968971008 in words is "nineteen billion, nine hundred sixty-eight million, nine hundred seventy-one thousand, eight".