18122243 has 2 divisors, whose sum is σ = 18122244. Its totient is φ = 18122242.

The previous prime is 18122207. The next prime is 18122309. The reversal of 18122243 is 34222181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18122243 - 2⁶ = 18122179 is a prime.

It is not a weakly prime, because it can be changed into another prime (18122543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9061121 + 9061122.

It is an arithmetic number, because the mean of its divisors is an integer number (9061122).

Almost surely, 2^18122243 is an apocalyptic number.

18122243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18122243 is an equidigital number, since it uses as much as digits as its factorization.

18122243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 23.

The square root of 18122243 is about 4257.0227859385. The cubic root of 18122243 is about 262.6660741982. Note that the first 3 decimals are identical.

The spelling of 18122243 in words is "eighteen million, one hundred twenty-two thousand, two hundred forty-three".