20003313313 has 6 divisors (see below), whose sum is σ = 21249194726. Its totient is φ = 18826647552.

The previous prime is 20003313289. The next prime is 20003313353. The reversal of 20003313313 is 31331330002.

It can be written as a sum of positive squares in 3 ways, for example, as 6488785809 + 13514527504 = 80553^2 + 116252^2 .

It is not a de Polignac number, because 20003313313 - 2⁹ = 20003312801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003313353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34607520 + ... + 34608097.

Almost surely, 2^20003313313 is an apocalyptic number.

It is an amenable number.

20003313313 is a deficient number, since it is larger than the sum of its proper divisors (1245881413).

20003313313 is an equidigital number, since it uses as much as digits as its factorization.

20003313313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69215651 (or 69215634 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 20003313313 its reverse (31331330002), we get a palindrome (51334643315).

The spelling of 20003313313 in words is "twenty billion, three million, three hundred thirteen thousand, three hundred thirteen".