20044345 has 4 divisors (see below), whose sum is σ = 24053220. Its totient is φ = 16035472.

The previous prime is 20044319. The next prime is 20044351. The reversal of 20044345 is 54344002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13749264 + 6295081 = 3708^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 20044345 - 2¹⁹ = 19520057 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2004430 + ... + 2004439.

It is an arithmetic number, because the mean of its divisors is an integer number (6013305).

Almost surely, 2^20044345 is an apocalyptic number.

It is an amenable number.

20044345 is a deficient number, since it is larger than the sum of its proper divisors (4008875).

20044345 is an equidigital number, since it uses as much as digits as its factorization.

20044345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008874.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 20044345 is about 4477.0911315273. The cubic root of 20044345 is about 271.6422316504.

Adding to 20044345 its reverse (54344002), we get a palindrome (74388347).

The spelling of 20044345 in words is "twenty million, forty-four thousand, three hundred forty-five".