18600229 has 2 divisors, whose sum is σ = 18600230. Its totient is φ = 18600228.

The previous prime is 18600187. The next prime is 18600251. The reversal of 18600229 is 92200681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18507204 + 93025 = 4302^2 + 305^2 .

It is an emirp because it is prime and its reverse (92200681) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18600229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18600197 and 18600206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18600299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9300114 + 9300115.

It is an arithmetic number, because the mean of its divisors is an integer number (9300115).

Almost surely, 2^18600229 is an apocalyptic number.

It is an amenable number.

18600229 is a deficient number, since it is larger than the sum of its proper divisors (1).

18600229 is an equidigital number, since it uses as much as digits as its factorization.

18600229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18600229 is about 4312.7982795396. The cubic root of 18600229 is about 264.9553929902.

The spelling of 18600229 in words is "eighteen million, six hundred thousand, two hundred twenty-nine".