20322120132 has 108 divisors (see below), whose sum is σ = 53711193900. Its totient is φ = 6727281984.

The previous prime is 20322120131. The next prime is 20322120139. The reversal of 20322120132 is 23102122302.

It can be written as a sum of positive squares in 2 ways, for example, as 5481033156 + 14841086976 = 74034^2 + 121824^2 .

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20322120131) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3907758 + ... + 3912954.

Almost surely, 2^20322120132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20322120132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26855596950).

20322120132 is an abundant number, since it is smaller than the sum of its proper divisors (33389073768).

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

20322120132 is an equidigital number, since it uses as much as digits as its factorization.

20322120132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5374 (or 5351 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20322120132 its reverse (23102122302), we get a palindrome (43424242434).

The spelling of 20322120132 in words is "twenty billion, three hundred twenty-two million, one hundred twenty thousand, one hundred thirty-two".