18008843 has 2 divisors, whose sum is σ = 18008844. Its totient is φ = 18008842.

The previous prime is 18008833. The next prime is 18008857. The reversal of 18008843 is 34880081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18008843 - 2¹² = 18004747 is a prime.

It is not a weakly prime, because it can be changed into another prime (18008833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9004421 + 9004422.

It is an arithmetic number, because the mean of its divisors is an integer number (9004422).

Almost surely, 2^18008843 is an apocalyptic number.

18008843 is a deficient number, since it is larger than the sum of its proper divisors (1).

18008843 is an equidigital number, since it uses as much as digits as its factorization.

18008843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18008843 is about 4243.6827166978. The cubic root of 18008843 is about 262.1170494617.

The spelling of 18008843 in words is "eighteen million, eight thousand, eight hundred forty-three".