30018 has 8 divisors (see below), whose sum is σ = 60048. Its totient is φ = 10004.

The previous prime is 30013. The next prime is 30029. The reversal of 30018 is 81003.

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

30018 is an admirable number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 29985 and 30012.

It is not an unprimeable number, because it can be changed into a prime (30011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2496 + ... + 2507.

It is an arithmetic number, because the mean of its divisors is an integer number (7506).

2³⁰⁰¹⁸ is an apocalyptic number.

30018 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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30024).

30018 is a wasteful number, since it uses less digits than its factorization.

30018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 30018 is about 173.2570344892. The cubic root of 30018 is about 31.0785382821.

The spelling of 30018 in words is "thirty thousand, eighteen".