6420443803 has 4 divisors (see below), whose sum is σ = 6425418328. Its totient is φ = 6415469280.

The previous prime is 6420443801. The next prime is 6420443819. The reversal of 6420443803 is 3083440246.

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 6420443803 - 2¹ = 6420443801 is a prime.

It is a super-2 number, since 2×6420443803² = 82444197254962205618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420443801) 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, 2485326 + ... + 2487907.

It is an arithmetic number, because the mean of its divisors is an integer number (1606354582).

Almost surely, 2^6420443803 is an apocalyptic number.

6420443803 is a deficient number, since it is larger than the sum of its proper divisors (4974525).

6420443803 is a wasteful number, since it uses less digits than its factorization.

6420443803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4974524.

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 6420443803 is about 80127.6718930483. The cubic root of 6420443803 is about 1858.6103431889.

It can be divided in two parts, 6420443 and 803, that added together give a palindrome (6421246).

The spelling of 6420443803 in words is "six billion, four hundred twenty million, four hundred forty-three thousand, eight hundred three".