20001031321 has 8 divisors (see below), whose sum is σ = 21290277600. Its totient is φ = 18735441120.

The previous prime is 20001031319. The next prime is 20001031331. The reversal of 20001031321 is 12313010002.

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 20001031321 - 2¹ = 20001031319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001031331) 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, 5912275 + ... + 5915656.

It is an arithmetic number, because the mean of its divisors is an integer number (2661284700).

Almost surely, 2^20001031321 is an apocalyptic number.

It is an amenable number.

20001031321 is a deficient number, since it is larger than the sum of its proper divisors (1289246279).

20001031321 is a wasteful number, since it uses less digits than its factorization.

20001031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11828039.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20001031321 its reverse (12313010002), we get a palindrome (32314041323).

The spelling of 20001031321 in words is "twenty billion, one million, thirty-one thousand, three hundred twenty-one".