20313013321 has 4 divisors (see below), whose sum is σ = 20316991252. Its totient is φ = 20309035392.

The previous prime is 20313013271. The next prime is 20313013351. The reversal of 20313013321 is 12331031302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12331031302 = 2 ⋅6165515651.

It can be written as a sum of positive squares in 2 ways, for example, as 4842628921 + 15470384400 = 69589^2 + 124380^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313013321 - 2¹³ = 20313005129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313013351) 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, 1981296 + ... + 1991521.

It is an arithmetic number, because the mean of its divisors is an integer number (5079247813).

Almost surely, 2^20313013321 is an apocalyptic number.

It is an amenable number.

20313013321 is a deficient number, since it is larger than the sum of its proper divisors (3977931).

20313013321 is an equidigital number, since it uses as much as digits as its factorization.

20313013321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977930.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20313013321 its reverse (12331031302), we get a palindrome (32644044623).

The spelling of 20313013321 in words is "twenty billion, three hundred thirteen million, thirteen thousand, three hundred twenty-one".