20321213133 has 8 divisors (see below), whose sum is σ = 29179177888. Its totient is φ = 12505361904.

The previous prime is 20321213117. The next prime is 20321213141. The reversal of 20321213133 is 33131212302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20321213133 - 2⁴ = 20321213117 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 (20321213113) 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, 260528335 + ... + 260528412.

It is an arithmetic number, because the mean of its divisors is an integer number (3647397236).

Almost surely, 2^20321213133 is an apocalyptic number.

It is an amenable number.

20321213133 is a deficient number, since it is larger than the sum of its proper divisors (8857964755).

20321213133 is a wasteful number, since it uses less digits than its factorization.

20321213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521056763.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20321213133 its reverse (33131212302), we get a palindrome (53452425435).

The spelling of 20321213133 in words is "twenty billion, three hundred twenty-one million, two hundred thirteen thousand, one hundred thirty-three".