20224144 has 10 divisors (see below), whose sum is σ = 39184310. Its totient is φ = 10112064.

The previous prime is 20224133. The next prime is 20224157. The reversal of 20224144 is 44142202.

It can be written as a sum of positive squares in only one way, i.e., 15116544 + 5107600 = 3888^2 + 2260^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631989 + ... + 632020.

It is an arithmetic number, because the mean of its divisors is an integer number (3918431).

Almost surely, 2^20224144 is an apocalyptic number.

It is an amenable number.

20224144 is a deficient number, since it is larger than the sum of its proper divisors (18960166).

20224144 is a wasteful number, since it uses less digits than its factorization.

20224144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264017 (or 1264011 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 20224144 is about 4497.1261934707. The cubic root of 20224144 is about 272.4520309470.

Adding to 20224144 its reverse (44142202), we get a palindrome (64366346).

The spelling of 20224144 in words is "twenty million, two hundred twenty-four thousand, one hundred forty-four".