20211232 has 48 divisors (see below), whose sum is σ = 42987672. Its totient is φ = 9318400.

The previous prime is 20211221. The next prime is 20211241. The reversal of 20211232 is 23211202.

It can be written as a sum of positive squares in 4 ways, for example, as 20106256 + 104976 = 4484^2 + 324^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28482 + ... + 29182.

Almost surely, 2^20211232 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 20211232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21493836).

20211232 is an abundant number, since it is smaller than the sum of its proper divisors (22776440).

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

20211232 is a wasteful number, since it uses less digits than its factorization.

20211232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20211232 is about 4495.6903807980. The cubic root of 20211232 is about 272.3940367405.

Adding to 20211232 its reverse (23211202), we get a palindrome (43422434).

The spelling of 20211232 in words is "twenty million, two hundred eleven thousand, two hundred thirty-two".