20441143 has 4 divisors (see below), whose sum is σ = 21146040. Its totient is φ = 19736248.

The previous prime is 20441137. The next prime is 20441147. The reversal of 20441143 is 34114402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20441143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20441143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20441147) 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, 352405 + ... + 352462.

It is an arithmetic number, because the mean of its divisors is an integer number (5286510).

Almost surely, 2^20441143 is an apocalyptic number.

20441143 is a deficient number, since it is larger than the sum of its proper divisors (704897).

20441143 is an equidigital number, since it uses as much as digits as its factorization.

20441143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704896.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20441143 is about 4521.1882287735. The cubic root of 20441143 is about 273.4230092762.

Adding to 20441143 its reverse (34114402), we get a palindrome (54555545).

The spelling of 20441143 in words is "twenty million, four hundred forty-one thousand, one hundred forty-three".