20000305 has 12 divisors (see below), whose sum is σ = 25989660. Its totient is φ = 14768832.

The previous prime is 20000303. The next prime is 20000311. The reversal of 20000305 is 50300002.

It can be written as a sum of positive squares in 6 ways, for example, as 5308416 + 14691889 = 2304^2 + 3833^2 .

It is not a de Polignac number, because 20000305 - 2¹ = 20000303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000291 and 20000300.

It is not an unprimeable number, because it can be changed into a prime (20000303) by changing a digit.

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, 10990 + ... + 12679.

It is an arithmetic number, because the mean of its divisors is an integer number (2165805).

Almost surely, 2^20000305 is an apocalyptic number.

It is an amenable number.

20000305 is a deficient number, since it is larger than the sum of its proper divisors (5989355).

20000305 is a wasteful number, since it uses less digits than its factorization.

20000305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23700 (or 23687 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 20000305 is about 4472.1700549062. The cubic root of 20000305 is about 271.4431414814.

Adding to 20000305 its reverse (50300002), we get a palindrome (70300307).

The spelling of 20000305 in words is "twenty million, three hundred five", and thus it is an aban number.