20031131331113 has 8 divisors (see below), whose sum is σ = 22898574971520. Its totient is φ = 17165151053280.

The previous prime is 20031131331109. The next prime is 20031131331157. The reversal of 20031131331113 is 31113313113002.

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 20031131331113 - 2² = 20031131331109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031131331173) 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, 365811308 + ... + 365866061.

It is an arithmetic number, because the mean of its divisors is an integer number (2862321871440).

Almost surely, 2^{20031131331113} is an apocalyptic number.

It is an amenable number.

20031131331113 is a deficient number, since it is larger than the sum of its proper divisors (2867443640407).

20031131331113 is an equidigital number, since it uses as much as digits as its factorization.

20031131331113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731681287.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 20031131331113 its reverse (31113313113002), we get a palindrome (51144444444115).

The spelling of 20031131331113 in words is "twenty trillion, thirty-one billion, one hundred thirty-one million, three hundred thirty-one thousand, one hundred thirteen".