18006285 has 32 divisors (see below), whose sum is σ = 31962240. Its totient is φ = 8582400.

The previous prime is 18006283. The next prime is 18006299. The reversal of 18006285 is 58260081.

It is not a de Polignac number, because 18006285 - 2¹ = 18006283 is a prime.

It is a super-3 number, since 3×18006285³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18006283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9171 + ... + 10959.

It is an arithmetic number, because the mean of its divisors is an integer number (998820).

Almost surely, 2^18006285 is an apocalyptic number.

18006285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18006285 is a deficient number, since it is larger than the sum of its proper divisors (13955955).

18006285 is a wasteful number, since it uses less digits than its factorization.

18006285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 18006285 is about 4243.3813168274. The cubic root of 18006285 is about 262.1046383893.

The spelling of 18006285 in words is "eighteen million, six thousand, two hundred eighty-five".