20366722669 has 2 divisors, whose sum is σ = 20366722670. Its totient is φ = 20366722668.

The previous prime is 20366722667. The next prime is 20366722693. The reversal of 20366722669 is 96622766302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16954644100 + 3412078569 = 130210^2 + 58413^2 .

It is a cyclic number.

It is not a de Polignac number, because 20366722669 - 2¹ = 20366722667 is a prime.

It is a super-2 number, since 2×20366722669² (a number of 21 digits) contains 22 as substring.

Together with 20366722667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20366722667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10183361334 + 10183361335.

It is an arithmetic number, because the mean of its divisors is an integer number (10183361335).

Almost surely, 2^20366722669 is an apocalyptic number.

It is an amenable number.

20366722669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20366722669 is an equidigital number, since it uses as much as digits as its factorization.

20366722669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 20366722669 in words is "twenty billion, three hundred sixty-six million, seven hundred twenty-two thousand, six hundred sixty-nine".