18916307 has 2 divisors, whose sum is σ = 18916308. Its totient is φ = 18916306.

The previous prime is 18916301. The next prime is 18916309. The reversal of 18916307 is 70361981.

It is a strong prime.

It is an emirp because it is prime and its reverse (70361981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18916307 - 2⁶ = 18916243 is a prime.

Together with 18916309, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18916301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9458153 + 9458154.

It is an arithmetic number, because the mean of its divisors is an integer number (9458154).

Almost surely, 2^18916307 is an apocalyptic number.

18916307 is a deficient number, since it is larger than the sum of its proper divisors (1).

18916307 is an equidigital number, since it uses as much as digits as its factorization.

18916307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 18916307 is about 4349.2881026669. The cubic root of 18916307 is about 266.4477872337.

The spelling of 18916307 in words is "eighteen million, nine hundred sixteen thousand, three hundred seven".