18045543 has 8 divisors (see below), whose sum is σ = 24098688. Its totient is φ = 12011384.

The previous prime is 18045541. The next prime is 18045553. The reversal of 18045543 is 34554081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18045543 - 2¹ = 18045541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18045543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045541) 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 7 ways as a sum of consecutive naturals, for example, 2355 + ... + 6452.

It is an arithmetic number, because the mean of its divisors is an integer number (3012336).

Almost surely, 2^18045543 is an apocalyptic number.

18045543 is a deficient number, since it is larger than the sum of its proper divisors (6053145).

18045543 is an equidigital number, since it uses as much as digits as its factorization.

18045543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9493.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 18045543 is about 4248.0045903930. The cubic root of 18045543 is about 262.2949836851.

The spelling of 18045543 in words is "eighteen million, forty-five thousand, five hundred forty-three".