20493067717 has 2 divisors, whose sum is σ = 20493067718. Its totient is φ = 20493067716.

The previous prime is 20493067711. The next prime is 20493067723. The reversal of 20493067717 is 71776039402.

It is a Cunningham number, because it is equal to 143154²+1.

It is a balanced prime because it is at equal distance from previous prime (20493067711) and next prime (20493067723).

It can be written as a sum of positive squares in only one way, i.e., 20493067716 + 1 = 143154^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 20493067717 - 2¹¹ = 20493065669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20493067711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10246533858 + 10246533859.

It is an arithmetic number, because the mean of its divisors is an integer number (10246533859).

Almost surely, 2^20493067717 is an apocalyptic number.

It is an amenable number.

20493067717 is a deficient number, since it is larger than the sum of its proper divisors (1).

20493067717 is an equidigital number, since it uses as much as digits as its factorization.

20493067717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 46.

The spelling of 20493067717 in words is "twenty billion, four hundred ninety-three million, sixty-seven thousand, seven hundred seventeen".