11820509317 has 2 divisors, whose sum is σ = 11820509318. Its totient is φ = 11820509316.

The previous prime is 11820509297. The next prime is 11820509333. The reversal of 11820509317 is 71390502811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5959994401 + 5860514916 = 77201^2 + 76554^2 .

It is a cyclic number.

It is not a de Polignac number, because 11820509317 - 2³¹ = 9673025669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11820509017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5910254658 + 5910254659.

It is an arithmetic number, because the mean of its divisors is an integer number (5910254659).

Almost surely, 2^11820509317 is an apocalyptic number.

It is an amenable number.

11820509317 is a deficient number, since it is larger than the sum of its proper divisors (1).

11820509317 is an equidigital number, since it uses as much as digits as its factorization.

11820509317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 11820509317 in words is "eleven billion, eight hundred twenty million, five hundred nine thousand, three hundred seventeen".