18001307 has 2 divisors, whose sum is σ = 18001308. Its totient is φ = 18001306.

The previous prime is 18001273. The next prime is 18001339. The reversal of 18001307 is 70310081.

It is a strong prime.

It is an emirp because it is prime and its reverse (70310081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18001307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18001367) 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, 9000653 + 9000654.

It is an arithmetic number, because the mean of its divisors is an integer number (9000654).

Almost surely, 2^18001307 is an apocalyptic number.

18001307 is a deficient number, since it is larger than the sum of its proper divisors (1).

18001307 is an equidigital number, since it uses as much as digits as its factorization.

18001307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 18001307 is about 4242.7947157505. The cubic root of 18001307 is about 262.0804824322.

Adding to 18001307 its reverse (70310081), we get a palindrome (88311388).

The spelling of 18001307 in words is "eighteen million, one thousand, three hundred seven".