18004266 has 72 divisors (see below), whose sum is σ = 46016100. Its totient is φ = 5072256.

The previous prime is 18004249. The next prime is 18004279. The reversal of 18004266 is 66240081.

It can be written as a sum of positive squares in 2 ways, for example, as 17464041 + 540225 = 4179^2 + 735^2 .

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 35 ways as a sum of consecutive naturals, for example, 120760 + ... + 120908.

Almost surely, 2^18004266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18004266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23008050).

18004266 is an abundant number, since it is smaller than the sum of its proper divisors (28011834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18004266 is a wasteful number, since it uses less digits than its factorization.

18004266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18004266 is about 4243.1434102561. The cubic root of 18004266 is about 262.0948416425.

The spelling of 18004266 in words is "eighteen million, four thousand, two hundred sixty-six".