20312021201333 has 4 divisors (see below), whose sum is σ = 21506845977900. Its totient is φ = 19117196424768.

The previous prime is 20312021201321. The next prime is 20312021201357. The reversal of 20312021201333 is 33310212021302.

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 10132494852964 + 10179526348369 = 3183158^2 + 3190537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312021201333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312021201299 and 20312021201308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312021201033) 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, 597412388258 + ... + 597412388291.

It is an arithmetic number, because the mean of its divisors is an integer number (5376711494475).

Almost surely, 2^{20312021201333} is an apocalyptic number.

It is an amenable number.

20312021201333 is a deficient number, since it is larger than the sum of its proper divisors (1194824776567).

20312021201333 is a wasteful number, since it uses less digits than its factorization.

20312021201333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194824776566.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20312021201333 its reverse (33310212021302), we get a palindrome (53622233222635).

The spelling of 20312021201333 in words is "twenty trillion, three hundred twelve billion, twenty-one million, two hundred one thousand, three hundred thirty-three".