20560643306250 has 192 divisors, whose sum is σ = 54595885389696. Its totient is φ = 5143806720000.

The previous prime is 20560643306243. The next prime is 20560643306261. The reversal of 20560643306250 is 5260334606502.

It is a super-3 number, since 3×20560643306250³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 99665709 + ... + 99871791.

It is an arithmetic number, because the mean of its divisors is an integer number (284353569738).

Almost surely, 2^{20560643306250} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20560643306250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27297942694848).

20560643306250 is an abundant number, since it is smaller than the sum of its proper divisors (34035242083446).

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

20560643306250 is a wasteful number, since it uses less digits than its factorization.

20560643306250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206443 (or 206423 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 20560643306250 in words is "twenty trillion, five hundred sixty billion, six hundred forty-three million, three hundred six thousand, two hundred fifty".