18116507 has 2 divisors, whose sum is σ = 18116508. Its totient is φ = 18116506.

The previous prime is 18116489. The next prime is 18116521. The reversal of 18116507 is 70561181.

It is a strong prime.

It is an emirp because it is prime and its reverse (70561181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18116507 - 2⁸ = 18116251 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18116507.

It is not a weakly prime, because it can be changed into another prime (18116537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058253 + 9058254.

It is an arithmetic number, because the mean of its divisors is an integer number (9058254).

Almost surely, 2^18116507 is an apocalyptic number.

18116507 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116507 is an equidigital number, since it uses as much as digits as its factorization.

18116507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 18116507 is about 4256.3490223430. The cubic root of 18116507 is about 262.6383585049.

Adding to 18116507 its reverse (70561181), we get a palindrome (88677688).

The spelling of 18116507 in words is "eighteen million, one hundred sixteen thousand, five hundred seven".