20993928996 has 48 divisors (see below), whose sum is σ = 50580185600. Its totient is φ = 6770338560.

The previous prime is 20993928979. The next prime is 20993928997. The reversal of 20993928996 is 69982939902.

It is not an unprimeable number, because it can be changed into a prime (20993928997) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2021850 + ... + 2032206.

Almost surely, 2^20993928996 is an apocalyptic number.

It is an amenable number.

20993928996 is an abundant number, since it is smaller than the sum of its proper divisors (29586256604).

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

20993928996 is a wasteful number, since it uses less digits than its factorization.

20993928996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15844 (or 15842 counting only the distinct ones).

The product of its (nonzero) digits is 34012224, while the sum is 66.

The spelling of 20993928996 in words is "twenty billion, nine hundred ninety-three million, nine hundred twenty-eight thousand, nine hundred ninety-six".