20132211220 has 144 divisors (see below), whose sum is σ = 48074015808. Its totient is φ = 7022955520.

The previous prime is 20132211157. The next prime is 20132211227. The reversal of 20132211220 is 2211223102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20132211194 and 20132211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132211227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43109427 + ... + 43109893.

It is an arithmetic number, because the mean of its divisors is an integer number (333847332).

Almost surely, 2^20132211220 is an apocalyptic number.

20132211220 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 20132211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24037007904).

20132211220 is an abundant number, since it is smaller than the sum of its proper divisors (27941804588).

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

20132211220 is a wasteful number, since it uses less digits than its factorization.

20132211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20132211220 its reverse (2211223102), we get a palindrome (22343434322).

The spelling of 20132211220 in words is "twenty billion, one hundred thirty-two million, two hundred eleven thousand, two hundred twenty".