2018305 has 4 divisors (see below), whose sum is σ = 2421972. Its totient is φ = 1614640.

The previous prime is 2018299. The next prime is 2018309. The reversal of 2018305 is 5038102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5038102 = 2 ⋅2519051.

It can be written as a sum of positive squares in 2 ways, for example, as 1032256 + 986049 = 1016^2 + 993^2 .

It is not a de Polignac number, because 2018305 - 2¹⁵ = 1985537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201826 + ... + 201835.

It is an arithmetic number, because the mean of its divisors is an integer number (605493).

2^2018305 is an apocalyptic number.

It is an amenable number.

2018305 is a deficient number, since it is larger than the sum of its proper divisors (403667).

2018305 is an equidigital number, since it uses as much as digits as its factorization.

2018305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403666.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2018305 is about 1420.6706162936. The cubic root of 2018305 is about 126.3753191476.

The spelling of 2018305 in words is "two million, eighteen thousand, three hundred five".