20331333133 has 4 divisors (see below), whose sum is σ = 20331739708. Its totient is φ = 20330926560.

The previous prime is 20331333131. The next prime is 20331333157. The reversal of 20331333133 is 33133313302.

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 14789721769 + 5541611364 = 121613^2 + 74442^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331333133 - 2¹ = 20331333131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331333098 and 20331333107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331333131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115698 + ... + 232483.

It is an arithmetic number, because the mean of its divisors is an integer number (5082934927).

Almost surely, 2^20331333133 is an apocalyptic number.

It is an amenable number.

20331333133 is a deficient number, since it is larger than the sum of its proper divisors (406575).

20331333133 is an equidigital number, since it uses as much as digits as its factorization.

20331333133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406574.

The product of its (nonzero) digits is 4374, while the sum is 25.

Adding to 20331333133 its reverse (33133313302), we get a palindrome (53464646435).

The spelling of 20331333133 in words is "twenty billion, three hundred thirty-one million, three hundred thirty-three thousand, one hundred thirty-three".