20124224 has 14 divisors (see below), whose sum is σ = 39934134. Its totient is φ = 10062080.

The previous prime is 20124217. The next prime is 20124229. The reversal of 20124224 is 42242102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 53824 = 4480^2 + 232^2 .

It is not an unprimeable number, because it can be changed into a prime (20124229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157157 + ... + 157284.

Almost surely, 2^20124224 is an apocalyptic number.

It is an amenable number.

20124224 is a deficient number, since it is larger than the sum of its proper divisors (19809910).

20124224 is an equidigital number, since it uses as much as digits as its factorization.

20124224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314453 (or 314443 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20124224 is about 4486.0031208192. The cubic root of 20124224 is about 272.0025951309.

Adding to 20124224 its reverse (42242102), we get a palindrome (62366326).

The spelling of 20124224 in words is "twenty million, one hundred twenty-four thousand, two hundred twenty-four".