18822443 has 2 divisors, whose sum is σ = 18822444. Its totient is φ = 18822442.

The previous prime is 18822437. The next prime is 18822467. The reversal of 18822443 is 34422881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18822443 - 2⁶ = 18822379 is a prime.

It is not a weakly prime, because it can be changed into another prime (18822493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9411221 + 9411222.

It is an arithmetic number, because the mean of its divisors is an integer number (9411222).

Almost surely, 2^18822443 is an apocalyptic number.

18822443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18822443 is an equidigital number, since it uses as much as digits as its factorization.

18822443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 32.

The square root of 18822443 is about 4338.4839517970. The cubic root of 18822443 is about 266.0063456002.

The spelling of 18822443 in words is "eighteen million, eight hundred twenty-two thousand, four hundred forty-three".