20021323133 has 8 divisors (see below), whose sum is σ = 22940336640. Its totient is φ = 17117015760.

The previous prime is 20021323129. The next prime is 20021323139. The reversal of 20021323133 is 33132312002.

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 20021323133 - 2² = 20021323129 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 (20021323139) 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 7 ways as a sum of consecutive naturals, for example, 3673613 + ... + 3679058.

It is an arithmetic number, because the mean of its divisors is an integer number (2867542080).

Almost surely, 2^20021323133 is an apocalyptic number.

It is an amenable number.

20021323133 is a deficient number, since it is larger than the sum of its proper divisors (2919013507).

20021323133 is an equidigital number, since it uses as much as digits as its factorization.

20021323133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7353067.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20021323133 its reverse (33132312002), we get a palindrome (53153635135).

The spelling of 20021323133 in words is "twenty billion, twenty-one million, three hundred twenty-three thousand, one hundred thirty-three".