19973297888 has 24 divisors (see below), whose sum is σ = 41032102608. Its totient is φ = 9552446464.

The previous prime is 19973297867. The next prime is 19973297891. The reversal of 19973297888 is 88879237991.

It is a congruent number.

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, 13568081 + ... + 13569552.

It is an arithmetic number, because the mean of its divisors is an integer number (1709670942).

Almost surely, 2^19973297888 is an apocalyptic number.

It is an amenable number.

19973297888 is an abundant number, since it is smaller than the sum of its proper divisors (21058804720).

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

19973297888 is a wasteful number, since it uses less digits than its factorization.

19973297888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27137666 (or 27137658 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 71.

The spelling of 19973297888 in words is "nineteen billion, nine hundred seventy-three million, two hundred ninety-seven thousand, eight hundred eighty-eight".