18222443 has 2 divisors, whose sum is σ = 18222444. Its totient is φ = 18222442.

The previous prime is 18222437. The next prime is 18222461. The reversal of 18222443 is 34422281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18222443 - 2⁴ = 18222427 is a prime.

It is not a weakly prime, because it can be changed into another prime (18222433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9111221 + 9111222.

It is an arithmetic number, because the mean of its divisors is an integer number (9111222).

Almost surely, 2^18222443 is an apocalyptic number.

18222443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18222443 is an equidigital number, since it uses as much as digits as its factorization.

18222443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

The square root of 18222443 is about 4268.7753513156. The cubic root of 18222443 is about 263.1492885164.

The spelling of 18222443 in words is "eighteen million, two hundred twenty-two thousand, four hundred forty-three".