18229507 has 2 divisors, whose sum is σ = 18229508. Its totient is φ = 18229506.

The previous prime is 18229489. The next prime is 18229511. The reversal of 18229507 is 70592281.

It is a strong prime.

It is an emirp because it is prime and its reverse (70592281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18229507 - 2²³ = 9840899 is a prime.

It is not a weakly prime, because it can be changed into another prime (18229517) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114753 + 9114754.

It is an arithmetic number, because the mean of its divisors is an integer number (9114754).

Almost surely, 2^18229507 is an apocalyptic number.

18229507 is a deficient number, since it is larger than the sum of its proper divisors (1).

18229507 is an equidigital number, since it uses as much as digits as its factorization.

18229507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 18229507 is about 4269.6026747228. The cubic root of 18229507 is about 263.1832877342.

The spelling of 18229507 in words is "eighteen million, two hundred twenty-nine thousand, five hundred seven".