18140543 has 8 divisors (see below), whose sum is σ = 18701760. Its totient is φ = 17586720.

The previous prime is 18140531. The next prime is 18140557. The reversal of 18140543 is 34504181.

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 18140543 - 2⁴ = 18140527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18140503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3353 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (2337720).

Almost surely, 2^18140543 is an apocalyptic number.

18140543 is a deficient number, since it is larger than the sum of its proper divisors (561217).

18140543 is a wasteful number, since it uses less digits than its factorization.

18140543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 18140543 is about 4259.1716330761. The cubic root of 18140543 is about 262.7544586233.

The spelling of 18140543 in words is "eighteen million, one hundred forty thousand, five hundred forty-three".