20560841 has 6 divisors (see below), whose sum is σ = 23917770. Its totient is φ = 17623536.

The previous prime is 20560829. The next prime is 20560847. The reversal of 20560841 is 14806502.

It can be written as a sum of positive squares in only one way, i.e., 19758025 + 802816 = 4445^2 + 896^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20560841 is a prime.

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 20560841.

It is not an unprimeable number, because it can be changed into a prime (20560847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209756 + ... + 209853.

It is an arithmetic number, because the mean of its divisors is an integer number (3986295).

Almost surely, 2^20560841 is an apocalyptic number.

It is an amenable number.

20560841 is a deficient number, since it is larger than the sum of its proper divisors (3356929).

20560841 is an equidigital number, since it uses as much as digits as its factorization.

20560841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419623 (or 419616 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20560841 is about 4534.4063558530. The cubic root of 20560841 is about 273.9556688540.

The spelling of 20560841 in words is "twenty million, five hundred sixty thousand, eight hundred forty-one".