20244224 has 144 divisors (see below), whose sum is σ = 54942720. Its totient is φ = 7188480.

The previous prime is 20244199. The next prime is 20244239. The reversal of 20244224 is 42244202.

It is a junction number, because it is equal to n+sod(n) for n = 20244196 and 20244205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256217 + ... + 256295.

Almost surely, 2^20244224 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 20244224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27471360).

20244224 is an abundant number, since it is smaller than the sum of its proper divisors (34698496).

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

20244224 is a wasteful number, since it uses less digits than its factorization.

20244224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 20244224 is about 4499.3581764514. The cubic root of 20244224 is about 272.5421711801.

Adding to 20244224 its reverse (42244202), we get a palindrome (62488426).

The spelling of 20244224 in words is "twenty million, two hundred forty-four thousand, two hundred twenty-four".