303320320013 has 4 divisors (see below), whose sum is σ = 304996123068. Its totient is φ = 301644516960.

The previous prime is 303320319997. The next prime is 303320320027. The reversal of 303320320013 is 310023023303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140412830089 + 162907489924 = 374717^2 + 403618^2 .

It is a cyclic number.

It is not a de Polignac number, because 303320320013 - 2⁴ = 303320319997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303320320913) 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, 837901256 + ... + 837901617.

It is an arithmetic number, because the mean of its divisors is an integer number (76249030767).

Almost surely, 2^303320320013 is an apocalyptic number.

It is an amenable number.

303320320013 is a deficient number, since it is larger than the sum of its proper divisors (1675803055).

303320320013 is a wasteful number, since it uses less digits than its factorization.

303320320013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675803054.

The product of its (nonzero) digits is 972, while the sum is 20.

Adding to 303320320013 its reverse (310023023303), we get a palindrome (613343343316).

The spelling of 303320320013 in words is "three hundred three billion, three hundred twenty million, three hundred twenty thousand, thirteen".