18040843 has 8 divisors (see below), whose sum is σ = 18466560. Its totient is φ = 17619240.

The previous prime is 18040831. The next prime is 18040879. The reversal of 18040843 is 34804081.

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 18040843 - 2⁹ = 18040331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18040643) 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, 8938 + ... + 10768.

It is an arithmetic number, because the mean of its divisors is an integer number (2308320).

Almost surely, 2^18040843 is an apocalyptic number.

18040843 is a deficient number, since it is larger than the sum of its proper divisors (425717).

18040843 is a wasteful number, since it uses less digits than its factorization.

18040843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 18040843 is about 4247.4513534589. The cubic root of 18040843 is about 262.2722099460.

The spelling of 18040843 in words is "eighteen million, forty thousand, eight hundred forty-three".