18122207 has 2 divisors, whose sum is σ = 18122208. Its totient is φ = 18122206.

The previous prime is 18122201. The next prime is 18122243. The reversal of 18122207 is 70222181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18122207 - 2⁴ = 18122191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18122201) 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, 9061103 + 9061104.

It is an arithmetic number, because the mean of its divisors is an integer number (9061104).

Almost surely, 2^18122207 is an apocalyptic number.

18122207 is a deficient number, since it is larger than the sum of its proper divisors (1).

18122207 is an equidigital number, since it uses as much as digits as its factorization.

18122207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 18122207 is about 4257.0185576293. The cubic root of 18122207 is about 262.6659002686.

Adding to 18122207 its reverse (70222181), we get a palindrome (88344388).

The spelling of 18122207 in words is "eighteen million, one hundred twenty-two thousand, two hundred seven".