201018 has 8 divisors (see below), whose sum is σ = 402048. Its totient is φ = 67004.

The previous prime is 201011. The next prime is 201031. The reversal of 201018 is 810102.

It is a happy number.

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

201018 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200994 and 201012.

It is not an unprimeable number, because it can be changed into a prime (201011) by changing a digit.

201018 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 3 ways as a sum of consecutive naturals, for example, 16746 + ... + 16757.

It is an arithmetic number, because the mean of its divisors is an integer number (50256).

2²⁰¹⁰¹⁸ is an apocalyptic number.

201018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201018 is a wasteful number, since it uses less digits than its factorization.

201018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33508.

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

The square root of 201018 is about 448.3503094679. The cubic root of 201018 is about 58.5794085612.

The spelling of 201018 in words is "two hundred one thousand, eighteen".