20320132220 has 24 divisors (see below), whose sum is σ = 42691032384. Its totient is φ = 8124480576.

The previous prime is 20320132219. The next prime is 20320132229. The reversal of 20320132220 is 2223102302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320132229) 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, 176387 + ... + 267866.

It is an arithmetic number, because the mean of its divisors is an integer number (1778793016).

Almost surely, 2^20320132220 is an apocalyptic number.

20320132220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320132220 is an abundant number, since it is smaller than the sum of its proper divisors (22370900164).

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

20320132220 is a wasteful number, since it uses less digits than its factorization.

20320132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446549 (or 446547 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20320132220 its reverse (2223102302), we get a palindrome (22543234522).

The spelling of 20320132220 in words is "twenty billion, three hundred twenty million, one hundred thirty-two thousand, two hundred twenty".