20321131313 has 8 divisors (see below), whose sum is σ = 24446473920. Its totient is φ = 16501369680.

The previous prime is 20321131301. The next prime is 20321131319. The reversal of 20321131313 is 31313112302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20321131313 - 2⁴ = 20321131297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321131319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76395098 + ... + 76395363.

It is an arithmetic number, because the mean of its divisors is an integer number (3055809240).

Almost surely, 2^20321131313 is an apocalyptic number.

It is an amenable number.

20321131313 is a deficient number, since it is larger than the sum of its proper divisors (4125342607).

20321131313 is a wasteful number, since it uses less digits than its factorization.

20321131313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152790487.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20321131313 its reverse (31313112302), we get a palindrome (51634243615).

The spelling of 20321131313 in words is "twenty billion, three hundred twenty-one million, one hundred thirty-one thousand, three hundred thirteen".