20031113321 has 8 divisors (see below), whose sum is σ = 20261161800. Its totient is φ = 19801175680.

The previous prime is 20031113309. The next prime is 20031113329. The reversal of 20031113321 is 12331113002.

It can be written as a sum of positive squares in 4 ways, for example, as 1646736400 + 18384376921 = 40580^2 + 135589^2 .

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

It is not a de Polignac number, because 20031113321 - 2²⁶ = 19964004457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20031113321.

It is not an unprimeable number, because it can be changed into a prime (20031113329) 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, 368015 + ... + 418923.

It is an arithmetic number, because the mean of its divisors is an integer number (2532645225).

Almost surely, 2^20031113321 is an apocalyptic number.

It is an amenable number.

20031113321 is a deficient number, since it is larger than the sum of its proper divisors (230048479).

20031113321 is an equidigital number, since it uses as much as digits as its factorization.

20031113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55419.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20031113321 its reverse (12331113002), we get a palindrome (32362226323).

The spelling of 20031113321 in words is "twenty billion, thirty-one million, one hundred thirteen thousand, three hundred twenty-one".