18066285 has 12 divisors (see below), whose sum is σ = 31314972. Its totient is φ = 9635328.

The previous prime is 18066277. The next prime is 18066287. The reversal of 18066285 is 58266081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13793796 + 4272489 = 3714^2 + 2067^2 .

It is not a de Polignac number, because 18066285 - 2³ = 18066277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18066287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200692 + ... + 200781.

It is an arithmetic number, because the mean of its divisors is an integer number (2609581).

Almost surely, 2^18066285 is an apocalyptic number.

18066285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18066285 is a deficient number, since it is larger than the sum of its proper divisors (13248687).

18066285 is a wasteful number, since it uses less digits than its factorization.

18066285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401484 (or 401481 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 18066285 is about 4250.4452707922. The cubic root of 18066285 is about 262.3954413511.

The spelling of 18066285 in words is "eighteen million, sixty-six thousand, two hundred eighty-five".