18685307 has 2 divisors, whose sum is σ = 18685308. Its totient is φ = 18685306.

The previous prime is 18685301. The next prime is 18685313. The reversal of 18685307 is 70358681.

It is a balanced prime because it is at equal distance from previous prime (18685301) and next prime (18685313).

It is a cyclic number.

It is not a de Polignac number, because 18685307 - 2¹⁰ = 18684283 is a prime.

It is not a weakly prime, because it can be changed into another prime (18685301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9342653 + 9342654.

It is an arithmetic number, because the mean of its divisors is an integer number (9342654).

Almost surely, 2^18685307 is an apocalyptic number.

18685307 is a deficient number, since it is larger than the sum of its proper divisors (1).

18685307 is an equidigital number, since it uses as much as digits as its factorization.

18685307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 18685307 is about 4322.6504600765. The cubic root of 18685307 is about 265.3587499045.

The spelling of 18685307 in words is "eighteen million, six hundred eighty-five thousand, three hundred seven".