20971622896 has 60 divisors (see below), whose sum is σ = 47478752832. Its totient is φ = 8947459584.

The previous prime is 20971622887. The next prime is 20971622911. The reversal of 20971622896 is 69822617902.

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 11 ways as a sum of consecutive naturals, for example, 114856 + ... + 234808.

Almost surely, 2^20971622896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20971622896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23739376416).

20971622896 is an abundant number, since it is smaller than the sum of its proper divisors (26507129936).

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

20971622896 is a wasteful number, since it uses less digits than its factorization.

20971622896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120198 (or 120185 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 20971622896 in words is "twenty billion, nine hundred seventy-one million, six hundred twenty-two thousand, eight hundred ninety-six".