20332131220 has 48 divisors (see below), whose sum is σ = 44045003520. Its totient is φ = 7878121344.

The previous prime is 20332131203. The next prime is 20332131221. The reversal of 20332131220 is 2213123302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332131221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107461 + ... + 228499.

It is an arithmetic number, because the mean of its divisors is an integer number (917604240).

Almost surely, 2^20332131220 is an apocalyptic number.

20332131220 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 20332131220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22022501760).

20332131220 is an abundant number, since it is smaller than the sum of its proper divisors (23712872300).

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

20332131220 is a wasteful number, since it uses less digits than its factorization.

20332131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121312 (or 121310 counting only the distinct ones).

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

Adding to 20332131220 its reverse (2213123302), we get a palindrome (22545254522).

The spelling of 20332131220 in words is "twenty billion, three hundred thirty-two million, one hundred thirty-one thousand, two hundred twenty".