20313321013 has 4 divisors (see below), whose sum is σ = 20314153260. Its totient is φ = 20312488768.

The previous prime is 20313321011. The next prime is 20313321019. The reversal of 20313321013 is 31012331302.

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 9904628484 + 10408692529 = 99522^2 + 102023^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313321013 - 2¹ = 20313321011 is a prime.

It is a super-3 number, since 3×20313321013³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313321011) 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, 378370 + ... + 428707.

It is an arithmetic number, because the mean of its divisors is an integer number (5078538315).

Almost surely, 2^20313321013 is an apocalyptic number.

It is an amenable number.

20313321013 is a deficient number, since it is larger than the sum of its proper divisors (832247).

20313321013 is an equidigital number, since it uses as much as digits as its factorization.

20313321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832246.

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

Adding to 20313321013 its reverse (31012331302), we get a palindrome (51325652315).

The spelling of 20313321013 in words is "twenty billion, three hundred thirteen million, three hundred twenty-one thousand, thirteen".