18303065 has 12 divisors (see below), whose sum is σ = 24142692. Its totient is φ = 13310880.

The previous prime is 18303053. The next prime is 18303091. The reversal of 18303065 is 56030381.

It can be written as a sum of positive squares in 2 ways, for example, as 13017664 + 5285401 = 3608^2 + 2299^2 .

It is not a de Polignac number, because 18303065 - 2⁶ = 18303001 is a prime.

It is a Duffinian number.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 14522 + ... + 15731.

It is an arithmetic number, because the mean of its divisors is an integer number (2011891).

Almost surely, 2^18303065 is an apocalyptic number.

It is an amenable number.

18303065 is a deficient number, since it is larger than the sum of its proper divisors (5839627).

18303065 is a wasteful number, since it uses less digits than its factorization.

18303065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30280 (or 30269 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 18303065 is about 4278.2081529538. The cubic root of 18303065 is about 263.5368035229.

The spelling of 18303065 in words is "eighteen million, three hundred three thousand, sixty-five".