18066118 has 16 divisors (see below), whose sum is σ = 31970304. Its totient is φ = 7492680.

The previous prime is 18066091. The next prime is 18066119. The reversal of 18066118 is 81166081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 18066118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18066119) 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, 20380 + ... + 21247.

It is an arithmetic number, because the mean of its divisors is an integer number (1998144).

Almost surely, 2^18066118 is an apocalyptic number.

18066118 is a deficient number, since it is larger than the sum of its proper divisors (13904186).

18066118 is a wasteful number, since it uses less digits than its factorization.

18066118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41667.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18066118 is about 4250.4256257462. The cubic root of 18066118 is about 262.3946328437.

The spelling of 18066118 in words is "eighteen million, sixty-six thousand, one hundred eighteen".