20568465351009 has 27 divisors (see below), whose sum is σ = 29800070425489. Its totient is φ = 13670867146920.

The previous prime is 20568465350963. The next prime is 20568465351011. The reversal of 20568465351009 is 90015356486502.

The square root of 20568465351009 is 4535247.

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

20568465351009 is a `hidden beast` number, since 2 + 0 + 5 + 68 + 4 + 65 + 3 + 510 + 0 + 9 = 666.

It is not a de Polignac number, because 20568465351009 - 2³³ = 20559875416417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20568465351019) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4884458914 + ... + 4884463124.

Almost surely, 2^{20568465351009} is an apocalyptic number.

20568465351009 is the 4535247-th square number.

20568465351009 is the 2267624-th centered octagonal number.

It is an amenable number.

20568465351009 is a deficient number, since it is larger than the sum of its proper divisors (9231605074480).

20568465351009 is an frugal number, since it uses more digits than its factorization.

20568465351009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9146 (or 4573 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 20568465351009 in words is "twenty trillion, five hundred sixty-eight billion, four hundred sixty-five million, three hundred fifty-one thousand, nine".