2001042443 has 8 divisors (see below), whose sum is σ = 2119150512. Its totient is φ = 1882978816.

The previous prime is 2001042359. The next prime is 2001042451. The reversal of 2001042443 is 3442401002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001042443 - 2¹⁶ = 2000976907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001042143) 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 7 ways as a sum of consecutive naturals, for example, 141971 + ... + 155427.

It is an arithmetic number, because the mean of its divisors is an integer number (264893814).

Almost surely, 2^2001042443 is an apocalyptic number.

2001042443 is a deficient number, since it is larger than the sum of its proper divisors (118108069).

2001042443 is a wasteful number, since it uses less digits than its factorization.

2001042443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22221.

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

The square root of 2001042443 is about 44733.0128987530. The cubic root of 2001042443 is about 1260.1399111874.

Adding to 2001042443 its reverse (3442401002), we get a palindrome (5443443445).

The spelling of 2001042443 in words is "two billion, one million, forty-two thousand, four hundred forty-three".