218018 has 8 divisors (see below), whose sum is σ = 332112. Its totient is φ = 107316.

The previous prime is 218003. The next prime is 218021. The reversal of 218018 is 810812.

218018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218018.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680 + ... + 947.

It is an arithmetic number, because the mean of its divisors is an integer number (41514).

2²¹⁸⁰¹⁸ is an apocalyptic number.

218018 is a deficient number, since it is larger than the sum of its proper divisors (114094).

218018 is a wasteful number, since it uses less digits than its factorization.

218018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 218018 is about 466.9239766814. The cubic root of 218018 is about 60.1862729598.

The spelling of 218018 in words is "two hundred eighteen thousand, eighteen".