20443043 has 4 divisors (see below), whose sum is σ = 21102528. Its totient is φ = 19783560.

The previous prime is 20443039. The next prime is 20443081. The reversal of 20443043 is 34034402.

It is a happy number.

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 20443043 - 2² = 20443039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20433043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329696 + ... + 329757.

It is an arithmetic number, because the mean of its divisors is an integer number (5275632).

Almost surely, 2^20443043 is an apocalyptic number.

20443043 is a deficient number, since it is larger than the sum of its proper divisors (659485).

20443043 is an equidigital number, since it uses as much as digits as its factorization.

20443043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659484.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 20443043 is about 4521.3983456449. The cubic root of 20443043 is about 273.4314805510.

Adding to 20443043 its reverse (34034402), we get a palindrome (54477445).

The spelling of 20443043 in words is "twenty million, four hundred forty-three thousand, forty-three".