20443100443 has 4 divisors (see below), whose sum is σ = 21102555328. Its totient is φ = 19783645560.

The previous prime is 20443100437. The next prime is 20443100477. The reversal of 20443100443 is 34400134402.

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 20443100443 - 2⁵ = 20443100411 is a prime.

It is a super-3 number, since 3×20443100443³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20443100243) 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, 329727396 + ... + 329727457.

It is an arithmetic number, because the mean of its divisors is an integer number (5275638832).

Almost surely, 2^20443100443 is an apocalyptic number.

20443100443 is a deficient number, since it is larger than the sum of its proper divisors (659454885).

20443100443 is an equidigital number, since it uses as much as digits as its factorization.

20443100443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659454884.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20443100443 its reverse (34400134402), we get a palindrome (54843234845).

The spelling of 20443100443 in words is "twenty billion, four hundred forty-three million, one hundred thousand, four hundred forty-three".