20444245 has 4 divisors (see below), whose sum is σ = 24533100. Its totient is φ = 16355392.

The previous prime is 20444233. The next prime is 20444257. The reversal of 20444245 is 54244402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20444233) and next prime (20444257).

It can be written as a sum of positive squares in 2 ways, for example, as 11062276 + 9381969 = 3326^2 + 3063^2 .

It is a cyclic number.

It is not a de Polignac number, because 20444245 - 2⁵ = 20444213 is a prime.

It is a congruent number.

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, 2044420 + ... + 2044429.

It is an arithmetic number, because the mean of its divisors is an integer number (6133275).

Almost surely, 2^20444245 is an apocalyptic number.

It is an amenable number.

20444245 is a deficient number, since it is larger than the sum of its proper divisors (4088855).

20444245 is an equidigital number, since it uses as much as digits as its factorization.

20444245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088854.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 20444245 is about 4521.5312671704. The cubic root of 20444245 is about 273.4368394760.

Adding to 20444245 its reverse (54244402), we get a palindrome (74688647).

The spelling of 20444245 in words is "twenty million, four hundred forty-four thousand, two hundred forty-five".