18313307 has 2 divisors, whose sum is σ = 18313308. Its totient is φ = 18313306.

The previous prime is 18313303. The next prime is 18313327. The reversal of 18313307 is 70331381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18313307 - 2² = 18313303 is a prime.

It is not a weakly prime, because it can be changed into another prime (18313303) 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, 9156653 + 9156654.

It is an arithmetic number, because the mean of its divisors is an integer number (9156654).

Almost surely, 2^18313307 is an apocalyptic number.

18313307 is a deficient number, since it is larger than the sum of its proper divisors (1).

18313307 is an equidigital number, since it uses as much as digits as its factorization.

18313307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 18313307 is about 4279.4049820039. The cubic root of 18313307 is about 263.5859508586.

Adding to 18313307 its reverse (70331381), we get a palindrome (88644688).

The spelling of 18313307 in words is "eighteen million, three hundred thirteen thousand, three hundred seven".