20331131321 has 8 divisors (see below), whose sum is σ = 20459820000. Its totient is φ = 20202491232.

The previous prime is 20331131299. The next prime is 20331131333. The reversal of 20331131321 is 12313113302.

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

It is not a de Polignac number, because 20331131321 - 2³⁰ = 19257389497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331131293 and 20331131302.

It is not an unprimeable number, because it can be changed into a prime (20331131341) 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, 1214021 + ... + 1230653.

It is an arithmetic number, because the mean of its divisors is an integer number (2557477500).

Almost surely, 2^20331131321 is an apocalyptic number.

It is an amenable number.

20331131321 is a deficient number, since it is larger than the sum of its proper divisors (128688679).

20331131321 is a wasteful number, since it uses less digits than its factorization.

20331131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24295.

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

Adding to 20331131321 its reverse (12313113302), we get a palindrome (32644244623).

The spelling of 20331131321 in words is "twenty billion, three hundred thirty-one million, one hundred thirty-one thousand, three hundred twenty-one".