18012066 has 16 divisors (see below), whose sum is σ = 36069600. Its totient is φ = 5996448.

The previous prime is 18012047. The next prime is 18012067. The reversal of 18012066 is 66021081.

It is not an unprimeable number, because it can be changed into a prime (18012067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5445 + ... + 8103.

It is an arithmetic number, because the mean of its divisors is an integer number (2254350).

Almost surely, 2^18012066 is an apocalyptic number.

18012066 is an abundant number, since it is smaller than the sum of its proper divisors (18057534).

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

18012066 is a wasteful number, since it uses less digits than its factorization.

18012066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 18012066 is about 4244.0624406340. The cubic root of 18012066 is about 262.1326853516.

It can be divided in two parts, 180 and 12066, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 18012066 in words is "eighteen million, twelve thousand, sixty-six".