18142717 has 2 divisors, whose sum is σ = 18142718. Its totient is φ = 18142716.

The previous prime is 18142703. The next prime is 18142753. The reversal of 18142717 is 71724181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16532356 + 1610361 = 4066^2 + 1269^2 .

It is an emirp because it is prime and its reverse (71724181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18142717 - 2²³ = 9754109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18142217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9071358 + 9071359.

It is an arithmetic number, because the mean of its divisors is an integer number (9071359).

Almost surely, 2^18142717 is an apocalyptic number.

It is an amenable number.

18142717 is a deficient number, since it is larger than the sum of its proper divisors (1).

18142717 is an equidigital number, since it uses as much as digits as its factorization.

18142717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 31.

The square root of 18142717 is about 4259.4268393764. The cubic root of 18142717 is about 262.7649545490.

Adding to 18142717 its reverse (71724181), we get a palindrome (89866898).

The spelling of 18142717 in words is "eighteen million, one hundred forty-two thousand, seven hundred seventeen".