12000018 has 8 divisors (see below), whose sum is σ = 24000048. Its totient is φ = 4000004.

The previous prime is 12000017. The next prime is 12000029. The reversal of 12000018 is 81000021.

It is a happy number.

12000018 is digitally balanced in base 2 and base 4, because in such bases 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.

12000018 is an admirable number.

12000018 is a modest number, since divided by 18 gives 12 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11999967 and 12000012.

It is not an unprimeable number, because it can be changed into a prime (12000017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999996 + ... + 1000007.

It is an arithmetic number, because the mean of its divisors is an integer number (3000006).

Almost surely, 2^12000018 is an apocalyptic number.

12000018 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.

12000018 is a wasteful number, since it uses less digits than its factorization.

12000018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000008.

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

The square root of 12000018 is about 3464.1042132130. The cubic root of 12000018 is about 228.9429629820.

Adding to 12000018 its reverse (81000021), we get a palindrome (93000039).

The spelling of 12000018 in words is "twelve million, eighteen", and thus it is an aban number and an uban number.