18532371317 has 2 divisors, whose sum is σ = 18532371318. Its totient is φ = 18532371316.

The previous prime is 18532371301. The next prime is 18532371359. The reversal of 18532371317 is 71317323581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10410937156 + 8121434161 = 102034^2 + 90119^2 .

It is a cyclic number.

It is not a de Polignac number, because 18532371317 - 2⁴ = 18532371301 is a prime.

It is a super-3 number, since 3×18532371317³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18532371367) 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, 9266185658 + 9266185659.

It is an arithmetic number, because the mean of its divisors is an integer number (9266185659).

Almost surely, 2^18532371317 is an apocalyptic number.

It is an amenable number.

18532371317 is a deficient number, since it is larger than the sum of its proper divisors (1).

18532371317 is an equidigital number, since it uses as much as digits as its factorization.

18532371317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

Adding to 18532371317 its reverse (71317323581), we get a palindrome (89849694898).

The spelling of 18532371317 in words is "eighteen billion, five hundred thirty-two million, three hundred seventy-one thousand, three hundred seventeen".