20530244 has 24 divisors (see below), whose sum is σ = 41489280. Its totient is φ = 8706816.

The previous prime is 20530229. The next prime is 20530247. The reversal of 20530244 is 44203502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064 + ... + 6495.

It is an arithmetic number, because the mean of its divisors is an integer number (1728720).

Almost surely, 2^20530244 is an apocalyptic number.

It is an amenable number.

20530244 is an abundant number, since it is smaller than the sum of its proper divisors (20959036).

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

20530244 is a wasteful number, since it uses less digits than its factorization.

20530244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7667 (or 7665 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20530244 is about 4531.0312292016. The cubic root of 20530244 is about 273.8197084142.

Adding to 20530244 its reverse (44203502), we get a palindrome (64733746).

The spelling of 20530244 in words is "twenty million, five hundred thirty thousand, two hundred forty-four".