18285009 has 8 divisors (see below), whose sum is σ = 25166592. Its totient is φ = 11796720.

The previous prime is 18284989. The next prime is 18285031. The reversal of 18285009 is 90058281.

It is a happy number.

18285009 is nontrivially palindromic in base 2.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18285009 - 2⁷ = 18284881 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18283009) 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, 98214 + ... + 98399.

It is an arithmetic number, because the mean of its divisors is an integer number (3145824).

Almost surely, 2^18285009 is an apocalyptic number.

It is an amenable number.

18285009 is a deficient number, since it is larger than the sum of its proper divisors (6881583).

18285009 is a wasteful number, since it uses less digits than its factorization.

18285009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196647.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 18285009 is about 4276.0974030066. The cubic root of 18285009 is about 263.4501151985.

The spelling of 18285009 in words is "eighteen million, two hundred eighty-five thousand, nine".