210018 has 32 divisors (see below), whose sum is σ = 466560. Its totient is φ = 62720.

The previous prime is 210011. The next prime is 210019. The reversal of 210018 is 810012.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 209985 and 210012.

It is not an unprimeable number, because it can be changed into a prime (210011) by changing a digit.

210018 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2923 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (14580).

2²¹⁰⁰¹⁸ is an apocalyptic number.

210018 is an abundant number, since it is smaller than the sum of its proper divisors (256542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210018 is a wasteful number, since it uses less digits than its factorization.

210018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 210018 is about 458.2772086849. The cubic root of 210018 is about 59.4409177425.

The spelling of 210018 in words is "two hundred ten thousand, eighteen".