320021103817 has 2 divisors, whose sum is σ = 320021103818. Its totient is φ = 320021103816.

The previous prime is 320021103781. The next prime is 320021103823. The reversal of 320021103817 is 718301120023.

Together with previous prime (320021103781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319830967296 + 190136521 = 565536^2 + 13789^2 .

It is a cyclic number.

It is not a de Polignac number, because 320021103817 - 2¹¹ = 320021101769 is a prime.

It is not a weakly prime, because it can be changed into another prime (320021103827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160010551908 + 160010551909.

It is an arithmetic number, because the mean of its divisors is an integer number (160010551909).

Almost surely, 2^320021103817 is an apocalyptic number.

It is an amenable number.

320021103817 is a deficient number, since it is larger than the sum of its proper divisors (1).

320021103817 is an equidigital number, since it uses as much as digits as its factorization.

320021103817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 320021103817 in words is "three hundred twenty billion, twenty-one million, one hundred three thousand, eight hundred seventeen".