20993792895 has 32 divisors (see below), whose sum is σ = 37366257600. Its totient is φ = 11183501952.

The previous prime is 20993792851. The next prime is 20993792909. The reversal of 20993792895 is 59829739902.

It is not a de Polignac number, because 20993792895 - 2⁷ = 20993792767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24001 + ... + 206309.

It is an arithmetic number, because the mean of its divisors is an integer number (1167695550).

Almost surely, 2^20993792895 is an apocalyptic number.

20993792895 is a deficient number, since it is larger than the sum of its proper divisors (16372464705).

20993792895 is a wasteful number, since it uses less digits than its factorization.

20993792895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183176 (or 183170 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 20993792895 in words is "twenty billion, nine hundred ninety-three million, seven hundred ninety-two thousand, eight hundred ninety-five".