20976882084 has 72 divisors (see below), whose sum is σ = 54058226040. Its totient is φ = 6856192512.

The previous prime is 20976882071. The next prime is 20976882103. The reversal of 20976882084 is 48028867902.

It can be written as a sum of positive squares in 4 ways, for example, as 15974432100 + 5002449984 = 126390^2 + 70728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20976882084.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5563752 + ... + 5567520.

It is an arithmetic number, because the mean of its divisors is an integer number (750808695).

Almost surely, 2^20976882084 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 20976882084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27029113020).

20976882084 is an abundant number, since it is smaller than the sum of its proper divisors (33081343956).

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

20976882084 is a wasteful number, since it uses less digits than its factorization.

20976882084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749 (or 6744 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 20976882084 in words is "twenty billion, nine hundred seventy-six million, eight hundred eighty-two thousand, eighty-four".