20133312220 has 96 divisors (see below), whose sum is σ = 49202012160. Its totient is φ = 6777146880.

The previous prime is 20133312217. The next prime is 20133312229. The reversal of 20133312220 is 2221333102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133312229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12149632 + ... + 12151288.

It is an arithmetic number, because the mean of its divisors is an integer number (512520960).

Almost surely, 2^20133312220 is an apocalyptic number.

20133312220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20133312220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24601006080).

20133312220 is an abundant number, since it is smaller than the sum of its proper divisors (29068699940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20133312220 is a wasteful number, since it uses less digits than its factorization.

20133312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203 (or 3201 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20133312220 its reverse (2221333102), we get a palindrome (22354645322).

The spelling of 20133312220 in words is "twenty billion, one hundred thirty-three million, three hundred twelve thousand, two hundred twenty".