18006012 has 18 divisors (see below), whose sum is σ = 45515288. Its totient is φ = 6001992.

The previous prime is 18005993. The next prime is 18006017. The reversal of 18006012 is 21060081.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250048 + ... + 250119.

Almost surely, 2^18006012 is an apocalyptic number.

18006012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18006012 is an abundant number, since it is smaller than the sum of its proper divisors (27509276).

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

18006012 is a wasteful number, since it uses less digits than its factorization.

18006012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500177 (or 500172 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18006012 is about 4243.3491489624. The cubic root of 18006012 is about 262.1033137606.

Adding to 18006012 its reverse (21060081), we get a palindrome (39066093).

The spelling of 18006012 in words is "eighteen million, six thousand, twelve".