20568722724 has 243 divisors, whose sum is σ = 59703481747. Its totient is φ = 5966188800.

The previous prime is 20568722719. The next prime is 20568722737. The reversal of 20568722724 is 42722786502.

The square root of 20568722724 is 143418.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2226896100 + 18341826624 = 47190^2 + 135432^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20568722724.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 388089082 + ... + 388089134.

Almost surely, 2^20568722724 is an apocalyptic number.

20568722724 is the 143418-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20568722724

20568722724 is an abundant number, since it is smaller than the sum of its proper divisors (39134759023).

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

20568722724 is a wasteful number, since it uses less digits than its factorization.

20568722724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 20568722724 in words is "twenty billion, five hundred sixty-eight million, seven hundred twenty-two thousand, seven hundred twenty-four".