20445232 has 40 divisors (see below), whose sum is σ = 41403600. Its totient is φ = 9768192.

The previous prime is 20445223. The next prime is 20445233. The reversal of 20445232 is 23254402.

It is not an unprimeable number, because it can be changed into a prime (20445233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64338 + ... + 64654.

It is an arithmetic number, because the mean of its divisors is an integer number (1035090).

Almost surely, 2^20445232 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 20445232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20701800).

20445232 is an abundant number, since it is smaller than the sum of its proper divisors (20958368).

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

20445232 is a wasteful number, since it uses less digits than its factorization.

20445232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20445232 is about 4521.6404102936. The cubic root of 20445232 is about 273.4412397007.

Adding to 20445232 its reverse (23254402), we get a palindrome (43699634).

The spelling of 20445232 in words is "twenty million, four hundred forty-five thousand, two hundred thirty-two".