20394347269 has 2 divisors, whose sum is σ = 20394347270. Its totient is φ = 20394347268.

The previous prime is 20394347209. The next prime is 20394347317. The reversal of 20394347269 is 96274349302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19666696644 + 727650625 = 140238^2 + 26975^2 .

It is a cyclic number.

It is not a de Polignac number, because 20394347269 - 2²⁹ = 19857476357 is a prime.

It is a super-3 number, since 3×20394347269³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20394347209) 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, 10197173634 + 10197173635.

It is an arithmetic number, because the mean of its divisors is an integer number (10197173635).

Almost surely, 2^20394347269 is an apocalyptic number.

It is an amenable number.

20394347269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20394347269 is an equidigital number, since it uses as much as digits as its factorization.

20394347269 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 20394347269 in words is "twenty billion, three hundred ninety-four million, three hundred forty-seven thousand, two hundred sixty-nine".