18613307 has 2 divisors, whose sum is σ = 18613308. Its totient is φ = 18613306.

The previous prime is 18613297. The next prime is 18613327. The reversal of 18613307 is 70331681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18613307 - 2²⁰ = 17564731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18613307.

It is not a weakly prime, because it can be changed into another prime (18613327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9306653 + 9306654.

It is an arithmetic number, because the mean of its divisors is an integer number (9306654).

Almost surely, 2^18613307 is an apocalyptic number.

18613307 is a deficient number, since it is larger than the sum of its proper divisors (1).

18613307 is an equidigital number, since it uses as much as digits as its factorization.

18613307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 18613307 is about 4314.3141981084. The cubic root of 18613307 is about 265.0174760042.

Adding to 18613307 its reverse (70331681), we get a palindrome (88944988).

The spelling of 18613307 in words is "eighteen million, six hundred thirteen thousand, three hundred seven".