20445056 has 32 divisors (see below), whose sum is σ = 40977480. Its totient is φ = 10160640.

The previous prime is 20445041. The next prime is 20445071. The reversal of 20445056 is 65054402.

It is an interprime number because it is at equal distance from previous prime (20445041) and next prime (20445071).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26630 + ... + 27386.

Almost surely, 2^20445056 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 20445056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20488740).

20445056 is an abundant number, since it is smaller than the sum of its proper divisors (20532424).

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

20445056 is an equidigital number, since it uses as much as digits as its factorization.

20445056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 20445056 is about 4521.6209482883. The cubic root of 20445056 is about 273.4404550712.

Adding to 20445056 its reverse (65054402), we get a palindrome (85499458).

The spelling of 20445056 in words is "twenty million, four hundred forty-five thousand, fifty-six".