20331120012013 has 4 divisors (see below), whose sum is σ = 20331470528028. Its totient is φ = 20330769496000.

The previous prime is 20331120011959. The next prime is 20331120012037. The reversal of 20331120012013 is 31021002113302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17987887711369 + 2343232300644 = 4241213^2 + 1530762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20331120012013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331120012713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175170988 + ... + 175287013.

It is an arithmetic number, because the mean of its divisors is an integer number (5082867632007).

Almost surely, 2^{20331120012013} is an apocalyptic number.

It is an amenable number.

20331120012013 is a deficient number, since it is larger than the sum of its proper divisors (350516015).

20331120012013 is an equidigital number, since it uses as much as digits as its factorization.

20331120012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350516014.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20331120012013 its reverse (31021002113302), we get a palindrome (51352122125315).

The spelling of 20331120012013 in words is "twenty trillion, three hundred thirty-one billion, one hundred twenty million, twelve thousand, thirteen".