20929453056 has 176 divisors, whose sum is σ = 62197358080. Its totient is φ = 6952366080.

The previous prime is 20929453009. The next prime is 20929453063. The reversal of 20929453056 is 65035492902.

20929453056 is a `hidden beast` number, since 20 + 9 + 2 + 94 + 530 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9150345 + ... + 9152631.

It is an arithmetic number, because the mean of its divisors is an integer number (353394080).

Almost surely, 2^20929453056 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 20929453056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31098679040).

20929453056 is an abundant number, since it is smaller than the sum of its proper divisors (41267905024).

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

20929453056 is a wasteful number, since it uses less digits than its factorization.

20929453056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647 (or 2623 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 20929453056 in words is "twenty billion, nine hundred twenty-nine million, four hundred fifty-three thousand, fifty-six".