20003313 has 16 divisors (see below), whose sum is σ = 29647296. Its totient is φ = 11893440.

The previous prime is 20003297. The next prime is 20003317. The reversal of 20003313 is 31330002.

It is a happy number.

It is not a de Polignac number, because 20003313 - 2⁴ = 20003297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20003317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3970 + ... + 7467.

It is an arithmetic number, because the mean of its divisors is an integer number (1852956).

Almost surely, 2^20003313 is an apocalyptic number.

It is an amenable number.

20003313 is a deficient number, since it is larger than the sum of its proper divisors (9643983).

20003313 is a wasteful number, since it uses less digits than its factorization.

20003313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 20003313 is about 4472.5063443219. The cubic root of 20003313 is about 271.4567489412.

Adding to 20003313 its reverse (31330002), we get a palindrome (51333315).

The spelling of 20003313 in words is "twenty million, three thousand, three hundred thirteen".