20876776128 has 336 divisors, whose sum is σ = 67278382080. Its totient is φ = 6145155072.

The previous prime is 20876776111. The next prime is 20876776139. The reversal of 20876776128 is 82167767802.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27577926 + ... + 27578682.

It is an arithmetic number, because the mean of its divisors is an integer number (200233280).

Almost surely, 2^20876776128 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 20876776128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33639191040).

20876776128 is an abundant number, since it is smaller than the sum of its proper divisors (46401605952).

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

20876776128 is a wasteful number, since it uses less digits than its factorization.

20876776128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 20876776128 in words is "twenty billion, eight hundred seventy-six million, seven hundred seventy-six thousand, one hundred twenty-eight".