20579629776 has 80 divisors (see below), whose sum is σ = 55503888000. Its totient is φ = 6558266880.

The previous prime is 20579629747. The next prime is 20579629781. The reversal of 20579629776 is 67792697502.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3031506 + ... + 3038286.

It is an arithmetic number, because the mean of its divisors is an integer number (693798600).

Almost surely, 2^20579629776 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 20579629776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27751944000).

20579629776 is an abundant number, since it is smaller than the sum of its proper divisors (34924258224).

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

20579629776 is a wasteful number, since it uses less digits than its factorization.

20579629776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9564 (or 9558 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 60.

The spelling of 20579629776 in words is "twenty billion, five hundred seventy-nine million, six hundred twenty-nine thousand, seven hundred seventy-six".