20303340313 has 4 divisors (see below), whose sum is σ = 20369475280. Its totient is φ = 20237205348.

The previous prime is 20303340263. The next prime is 20303340319. The reversal of 20303340313 is 31304330302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20303340313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20303340319) 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, 33067023 + ... + 33067636.

It is an arithmetic number, because the mean of its divisors is an integer number (5092368820).

Almost surely, 2^20303340313 is an apocalyptic number.

It is an amenable number.

20303340313 is a deficient number, since it is larger than the sum of its proper divisors (66134967).

20303340313 is an equidigital number, since it uses as much as digits as its factorization.

20303340313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66134966.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 20303340313 its reverse (31304330302), we get a palindrome (51607670615).

The spelling of 20303340313 in words is "twenty billion, three hundred three million, three hundred forty thousand, three hundred thirteen".