18143 has 2 divisors, whose sum is σ = 18144. Its totient is φ = 18142.

The previous prime is 18133. The next prime is 18149. The reversal of 18143 is 34181.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18143 - 2⁴ = 18127 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 9 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18143.

It is not a weakly prime, because it can be changed into another prime (18149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9071 + 9072.

It is an arithmetic number, because the mean of its divisors is an integer number (9072).

2¹⁸¹⁴³ is an apocalyptic number.

18143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18143 is an equidigital number, since it uses as much as digits as its factorization.

18143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 18143 is about 134.6959539110. The cubic root of 18143 is about 26.2766320792.

It can be divided in two parts, 18 and 143, that added together give a palindrome (161).

The spelling of 18143 in words is "eighteen thousand, one hundred forty-three".