20566734883201 has 64 divisors (see below), whose sum is σ = 23394298281984. Its totient is φ = 17938900742400.

The previous prime is 20566734883181. The next prime is 20566734883207. The reversal of 20566734883201 is 10238843766502.

It is a cyclic number.

It is not a de Polignac number, because 20566734883201 - 2⁷ = 20566734883073 is a prime.

It is a super-2 number, since 2×20566734883201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20566734883207) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 10227117286 + ... + 10227119296.

It is an arithmetic number, because the mean of its divisors is an integer number (365535910656).

Almost surely, 2^{20566734883201} is an apocalyptic number.

It is an amenable number.

20566734883201 is a deficient number, since it is larger than the sum of its proper divisors (2827563398783).

20566734883201 is a wasteful number, since it uses less digits than its factorization.

20566734883201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 20566734883201 in words is "twenty trillion, five hundred sixty-six billion, seven hundred thirty-four million, eight hundred eighty-three thousand, two hundred one".