18312730010117 has 2 divisors, whose sum is σ = 18312730010118. Its totient is φ = 18312730010116.

The previous prime is 18312730010093. The next prime is 18312730010207. The reversal of 18312730010117 is 71101003721381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18236307619201 + 76422390916 = 4270399^2 + 276446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18312730010117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18312730010917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9156365005058 + 9156365005059.

It is an arithmetic number, because the mean of its divisors is an integer number (9156365005059).

Almost surely, 2^{18312730010117} is an apocalyptic number.

It is an amenable number.

18312730010117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18312730010117 is an equidigital number, since it uses as much as digits as its factorization.

18312730010117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 35.

Adding to 18312730010117 its reverse (71101003721381), we get a palindrome (89413733731498).

The spelling of 18312730010117 in words is "eighteen trillion, three hundred twelve billion, seven hundred thirty million, ten thousand, one hundred seventeen".