18000305 has 8 divisors (see below), whose sum is σ = 22297344. Its totient is φ = 13935600.

The previous prime is 18000259. The next prime is 18000319. The reversal of 18000305 is 50300081.

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

It is not a de Polignac number, because 18000305 - 2¹⁶ = 17934769 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 57911 + ... + 58220.

It is an arithmetic number, because the mean of its divisors is an integer number (2787168).

Almost surely, 2^18000305 is an apocalyptic number.

It is an amenable number.

18000305 is a deficient number, since it is larger than the sum of its proper divisors (4297039).

18000305 is a wasteful number, since it uses less digits than its factorization.

18000305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116167.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 18000305 is about 4242.6766315617. The cubic root of 18000305 is about 262.0756196461.

Adding to 18000305 its reverse (50300081), we get a palindrome (68300386).

The spelling of 18000305 in words is "eighteen million, three hundred five", and thus it is an aban number.