20244143 has 4 divisors (see below), whose sum is σ = 20791320. Its totient is φ = 19696968.

The previous prime is 20244121. The next prime is 20244149. The reversal of 20244143 is 34144202.

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

It is a cyclic number.

It is not a de Polignac number, because 20244143 - 2¹⁶ = 20178607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273533 + ... + 273606.

It is an arithmetic number, because the mean of its divisors is an integer number (5197830).

Almost surely, 2^20244143 is an apocalyptic number.

20244143 is a deficient number, since it is larger than the sum of its proper divisors (547177).

20244143 is an equidigital number, since it uses as much as digits as its factorization.

20244143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547176.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20244143 is about 4499.3491751586. The cubic root of 20244143 is about 272.5418076864.

Adding to 20244143 its reverse (34144202), we get a palindrome (54388345).

The spelling of 20244143 in words is "twenty million, two hundred forty-four thousand, one hundred forty-three".