20208444 has 96 divisors (see below), whose sum is σ = 53706240. Its totient is φ = 5879808.

The previous prime is 20208443. The next prime is 20208499. The reversal of 20208444 is 44480202.

It is a super-2 number, since 2×20208444² = 816762417802272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20208443) 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 31 ways as a sum of consecutive naturals, for example, 276792 + ... + 276864.

It is an arithmetic number, because the mean of its divisors is an integer number (559440).

Almost surely, 2^20208444 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 20208444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26853120).

20208444 is an abundant number, since it is smaller than the sum of its proper divisors (33497796).

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

20208444 is a wasteful number, since it uses less digits than its factorization.

20208444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 20208444 is about 4495.3802953699. The cubic root of 20208444 is about 272.3815112052.

Adding to 20208444 its reverse (44480202), we get a palindrome (64688646).

The spelling of 20208444 in words is "twenty million, two hundred eight thousand, four hundred forty-four".