10820194316689 has 2 divisors, whose sum is σ = 10820194316690. Its totient is φ = 10820194316688.

The previous prime is 10820194316683. The next prime is 10820194316773. The reversal of 10820194316689 is 98661349102801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10523321897089 + 296872419600 = 3243967^2 + 544860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10820194316689 is a prime.

It is not a weakly prime, because it can be changed into another prime (10820194316683) 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, 5410097158344 + 5410097158345.

It is an arithmetic number, because the mean of its divisors is an integer number (5410097158345).

Almost surely, 2^{10820194316689} is an apocalyptic number.

It is an amenable number.

10820194316689 is a deficient number, since it is larger than the sum of its proper divisors (1).

10820194316689 is an equidigital number, since it uses as much as digits as its factorization.

10820194316689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 10820194316689 in words is "ten trillion, eight hundred twenty billion, one hundred ninety-four million, three hundred sixteen thousand, six hundred eighty-nine".