20001999968 has 24 divisors (see below), whose sum is σ = 39443850432. Its totient is φ = 9984514176.

The previous prime is 20001999929. The next prime is 20001999977. The reversal of 20001999968 is 86999910002.

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, 495455 + ... + 534302.

It is an arithmetic number, because the mean of its divisors is an integer number (1643493768).

Almost surely, 2^20001999968 is an apocalyptic number.

It is an amenable number.

20001999968 is a deficient number, since it is larger than the sum of its proper divisors (19441850464).

20001999968 is a wasteful number, since it uses less digits than its factorization.

20001999968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030374 (or 1030366 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 53.

The spelling of 20001999968 in words is "twenty billion, one million, nine hundred ninety-nine thousand, nine hundred sixty-eight".