20224040 has 16 divisors (see below), whose sum is σ = 45504180. Its totient is φ = 8089600.

The previous prime is 20224031. The next prime is 20224069. The reversal of 20224040 is 4042202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19061956 + 1162084 = 4366^2 + 1078^2 .

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, 252761 + ... + 252840.

Almost surely, 2^20224040 is an apocalyptic number.

20224040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20224040 is an abundant number, since it is smaller than the sum of its proper divisors (25280140).

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

20224040 is a wasteful number, since it uses less digits than its factorization.

20224040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505612 (or 505608 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20224040 is about 4497.1146305159. The cubic root of 20224040 is about 272.4515639299.

Adding to 20224040 its reverse (4042202), we get a palindrome (24266242).

It can be divided in two parts, 202 and 24040, that added together give a palindrome (24242).

The spelling of 20224040 in words is "twenty million, two hundred twenty-four thousand, forty".