18009266 has 8 divisors (see below), whose sum is σ = 29469744. Its totient is φ = 8186020.

The previous prime is 18009259. The next prime is 18009287. The reversal of 18009266 is 66290081.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409280 + ... + 409323.

It is an arithmetic number, because the mean of its divisors is an integer number (3683718).

Almost surely, 2^18009266 is an apocalyptic number.

18009266 is a deficient number, since it is larger than the sum of its proper divisors (11460478).

18009266 is a wasteful number, since it uses less digits than its factorization.

18009266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818616.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18009266 is about 4243.7325551924. The cubic root of 18009266 is about 262.1191016876.

The spelling of 18009266 in words is "eighteen million, nine thousand, two hundred sixty-six".