18022303 has 8 divisors (see below), whose sum is σ = 19539296. Its totient is φ = 16524000.

The previous prime is 18022297. The next prime is 18022327. The reversal of 18022303 is 30322081.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18022303 - 2⁹ = 18021791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18022343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2628 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (2442412).

Almost surely, 2^18022303 is an apocalyptic number.

18022303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18022303 is a deficient number, since it is larger than the sum of its proper divisors (1516993).

18022303 is a wasteful number, since it uses less digits than its factorization.

18022303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9345.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 18022303 is about 4245.2683071862. The cubic root of 18022303 is about 262.1823362187.

Adding to 18022303 its reverse (30322081), we get a palindrome (48344384).

The spelling of 18022303 in words is "eighteen million, twenty-two thousand, three hundred three".