18043 has 2 divisors, whose sum is σ = 18044. Its totient is φ = 18042.

The previous prime is 18041. The next prime is 18047. The reversal of 18043 is 34081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18043 - 2¹ = 18041 is a prime.

Together with 18041, it forms a pair of twin primes.

18043 is a lucky number.

It is a plaindrome in base 9 and base 16.

It is not a weakly prime, because it can be changed into another prime (18041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9021 + 9022.

It is an arithmetic number, because the mean of its divisors is an integer number (9022).

2¹⁸⁰⁴³ is an apocalyptic number.

18043 is a deficient number, since it is larger than the sum of its proper divisors (1).

18043 is an equidigital number, since it uses as much as digits as its factorization.

18043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 18043 is about 134.3242345967. The cubic root of 18043 is about 26.2282662130.

The spelling of 18043 in words is "eighteen thousand, forty-three".