20116693309 has 2 divisors, whose sum is σ = 20116693310. Its totient is φ = 20116693308.

The previous prime is 20116693237. The next prime is 20116693319. The reversal of 20116693309 is 90339661102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20106389209 + 10304100 = 141797^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 20116693309 - 2²⁵ = 20083138877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20116693319) 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, 10058346654 + 10058346655.

It is an arithmetic number, because the mean of its divisors is an integer number (10058346655).

Almost surely, 2^20116693309 is an apocalyptic number.

It is an amenable number.

20116693309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116693309 is an equidigital number, since it uses as much as digits as its factorization.

20116693309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The spelling of 20116693309 in words is "twenty billion, one hundred sixteen million, six hundred ninety-three thousand, three hundred nine".