20041005443 has 2 divisors, whose sum is σ = 20041005444. Its totient is φ = 20041005442.

The previous prime is 20041005431. The next prime is 20041005461. The reversal of 20041005443 is 34450014002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20041005443 - 2¹² = 20041001347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20041004443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020502721 + 10020502722.

It is an arithmetic number, because the mean of its divisors is an integer number (10020502722).

Almost surely, 2^20041005443 is an apocalyptic number.

20041005443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041005443 is an equidigital number, since it uses as much as digits as its factorization.

20041005443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20041005443 its reverse (34450014002), we get a palindrome (54491019445).

The spelling of 20041005443 in words is "twenty billion, forty-one million, five thousand, four hundred forty-three".