20566163465411 has 2 divisors, whose sum is σ = 20566163465412. Its totient is φ = 20566163465410.

The previous prime is 20566163465401. The next prime is 20566163465467. The reversal of 20566163465411 is 11456436166502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20566163465411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20566163465411.

It is not a weakly prime, because it can be changed into another prime (20566163465401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10283081732705 + 10283081732706.

It is an arithmetic number, because the mean of its divisors is an integer number (10283081732706).

Almost surely, 2^{20566163465411} is an apocalyptic number.

20566163465411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20566163465411 is an equidigital number, since it uses as much as digits as its factorization.

20566163465411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 20566163465411 in words is "twenty trillion, five hundred sixty-six billion, one hundred sixty-three million, four hundred sixty-five thousand, four hundred eleven".