20244245 has 8 divisors (see below), whose sum is σ = 27763584. Its totient is φ = 13881744.

The previous prime is 20244239. The next prime is 20244247. The reversal of 20244245 is 54244202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20244245 - 2⁸ = 20243989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20244245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244247) 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 in 7 ways as a sum of consecutive naturals, for example, 289169 + ... + 289238.

It is an arithmetic number, because the mean of its divisors is an integer number (3470448).

Almost surely, 2^20244245 is an apocalyptic number.

It is an amenable number.

20244245 is a deficient number, since it is larger than the sum of its proper divisors (7519339).

20244245 is an equidigital number, since it uses as much as digits as its factorization.

20244245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578419.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 20244245 is about 4499.3605101170. The cubic root of 20244245 is about 272.5422654191.

Adding to 20244245 its reverse (54244202), we get a palindrome (74488447).

The spelling of 20244245 in words is "twenty million, two hundred forty-four thousand, two hundred forty-five".