18744307 has 2 divisors, whose sum is σ = 18744308. Its totient is φ = 18744306.

The previous prime is 18744293. The next prime is 18744329. The reversal of 18744307 is 70344781.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18744307 is a prime.

It is not a weakly prime, because it can be changed into another prime (18744347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9372153 + 9372154.

It is an arithmetic number, because the mean of its divisors is an integer number (9372154).

Almost surely, 2^18744307 is an apocalyptic number.

18744307 is a deficient number, since it is larger than the sum of its proper divisors (1).

18744307 is an equidigital number, since it uses as much as digits as its factorization.

18744307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 18744307 is about 4329.4695979993. The cubic root of 18744307 is about 265.6377519507.

The spelling of 18744307 in words is "eighteen million, seven hundred forty-four thousand, three hundred seven".