18143343 has 12 divisors (see below), whose sum is σ = 27346800. Its totient is φ = 11569536.

The previous prime is 18143341. The next prime is 18143353. The reversal of 18143343 is 34334181.

It is not a de Polignac number, because 18143343 - 2¹ = 18143341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18143341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43618 + ... + 44031.

It is an arithmetic number, because the mean of its divisors is an integer number (2278900).

Almost surely, 2^18143343 is an apocalyptic number.

18143343 is a deficient number, since it is larger than the sum of its proper divisors (9203457).

18143343 is a wasteful number, since it uses less digits than its factorization.

18143343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87678 (or 87675 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 18143343 is about 4259.5003228078. The cubic root of 18143343 is about 262.7679766794.

It can be divided in two parts, 181433 and 43, that added together give a square (181476 = 426²).

The spelling of 18143343 in words is "eighteen million, one hundred forty-three thousand, three hundred forty-three".