20004220443 has 4 divisors (see below), whose sum is σ = 26672293928. Its totient is φ = 13336146960.

The previous prime is 20004220429. The next prime is 20004220487. The reversal of 20004220443 is 34402240002.

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

It is not a de Polignac number, because 20004220443 - 2³⁴ = 2824351259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004220403) 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, 3334036738 + ... + 3334036743.

It is an arithmetic number, because the mean of its divisors is an integer number (6668073482).

Almost surely, 2^20004220443 is an apocalyptic number.

20004220443 is a deficient number, since it is larger than the sum of its proper divisors (6668073485).

20004220443 is an equidigital number, since it uses as much as digits as its factorization.

20004220443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668073484.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20004220443 its reverse (34402240002), we get a palindrome (54406460445).

The spelling of 20004220443 in words is "twenty billion, four million, two hundred twenty thousand, four hundred forty-three".