20109224 has 8 divisors (see below), whose sum is σ = 37704810. Its totient is φ = 10054608.

The previous prime is 20109211. The next prime is 20109227. The reversal of 20109224 is 42290102.

It can be written as a sum of positive squares in only one way, i.e., 18645124 + 1464100 = 4318^2 + 1210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20109196 and 20109205.

It is not an unprimeable number, because it can be changed into a prime (20109227) 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 as a sum of consecutive naturals, namely, 1256819 + ... + 1256834.

Almost surely, 2^20109224 is an apocalyptic number.

It is an amenable number.

20109224 is a deficient number, since it is larger than the sum of its proper divisors (17595586).

20109224 is a wasteful number, since it uses less digits than its factorization.

20109224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513659 (or 2513655 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20109224 is about 4484.3309422923. The cubic root of 20109224 is about 271.9349974427.

Adding to 20109224 its reverse (42290102), we get a palindrome (62399326).

The spelling of 20109224 in words is "twenty million, one hundred nine thousand, two hundred twenty-four".