13320520313 has 4 divisors (see below), whose sum is σ = 13502993268. Its totient is φ = 13138047360.

The previous prime is 13320520307. The next prime is 13320520327. The reversal of 13320520313 is 31302502331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31302502331 = 17659 ⋅1772609.

It can be written as a sum of positive squares in 2 ways, for example, as 3827525689 + 9492994624 = 61867^2 + 97432^2 .

It is a cyclic number.

It is not a de Polignac number, because 13320520313 - 2⁶ = 13320520249 is a prime.

It is a super-2 number, since 2×13320520313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13320520813) 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, 91236368 + ... + 91236513.

It is an arithmetic number, because the mean of its divisors is an integer number (3375748317).

Almost surely, 2^13320520313 is an apocalyptic number.

It is an amenable number.

13320520313 is a deficient number, since it is larger than the sum of its proper divisors (182472955).

13320520313 is an equidigital number, since it uses as much as digits as its factorization.

13320520313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182472954.

The product of its (nonzero) digits is 1620, while the sum is 23.

The spelling of 13320520313 in words is "thirteen billion, three hundred twenty million, five hundred twenty thousand, three hundred thirteen".