20331421133 has 8 divisors (see below), whose sum is σ = 21547927800. Its totient is φ = 19117196800.

The previous prime is 20331421127. The next prime is 20331421147. The reversal of 20331421133 is 33112413302.

It can be written as a sum of positive squares in 4 ways, for example, as 5452788649 + 14878632484 = 73843^2 + 121978^2 .

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 20331421133 - 2¹⁴ = 20331404749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331421099 and 20331421108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331421183) 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, 552218 + ... + 587883.

It is an arithmetic number, because the mean of its divisors is an integer number (2693490975).

Almost surely, 2^20331421133 is an apocalyptic number.

It is an amenable number.

20331421133 is a deficient number, since it is larger than the sum of its proper divisors (1216506667).

20331421133 is a wasteful number, since it uses less digits than its factorization.

20331421133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141167.

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

Adding to 20331421133 its reverse (33112413302), we get a palindrome (53443834435).

The spelling of 20331421133 in words is "twenty billion, three hundred thirty-one million, four hundred twenty-one thousand, one hundred thirty-three".