20444320 has 48 divisors (see below), whose sum is σ = 52020360. Its totient is φ = 7547904.

The previous prime is 20444293. The next prime is 20444327. The reversal of 20444320 is 2344402.

It can be written as a sum of positive squares in 4 ways, for example, as 17073424 + 3370896 = 4132^2 + 1836^2 .

It is not an unprimeable number, because it can be changed into a prime (20444327) 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, 2835 + ... + 6994.

Almost surely, 2^20444320 is an apocalyptic number.

20444320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20444320 is an abundant number, since it is smaller than the sum of its proper divisors (31576040).

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

20444320 is a wasteful number, since it uses less digits than its factorization.

20444320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9857 (or 9849 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 20444320 is about 4521.5395608133. The cubic root of 20444320 is about 273.4371738445.

Adding to 20444320 its reverse (2344402), we get a palindrome (22788722).

The spelling of 20444320 in words is "twenty million, four hundred forty-four thousand, three hundred twenty".