20303313 has 16 divisors (see below), whose sum is σ = 27518400. Its totient is φ = 13314240.

The previous prime is 20303299. The next prime is 20303329. The reversal of 20303313 is 31330302.

It is not a de Polignac number, because 20303313 - 2⁵ = 20303281 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20303292 and 20303301.

It is not an unprimeable number, because it can be changed into a prime (20303513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75343 + ... + 75611.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^20303313 is an apocalyptic number.

It is an amenable number.

20303313 is a deficient number, since it is larger than the sum of its proper divisors (7215087).

20303313 is a wasteful number, since it uses less digits than its factorization.

20303313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its (nonzero) digits is 162, while the sum is 15.

The square root of 20303313 is about 4505.9197729210. The cubic root of 20303313 is about 272.8070796846.

Adding to 20303313 its reverse (31330302), we get a palindrome (51633615).

The spelling of 20303313 in words is "twenty million, three hundred three thousand, three hundred thirteen".