4430444320021 has 6 divisors (see below), whose sum is σ = 4515614843810. Its totient is φ = 4346851028208.

The previous prime is 4430444320013. The next prime is 4430444320109. The reversal of 4430444320021 is 1200234440344.

It can be written as a sum of positive squares in 3 ways, for example, as 602595112900 + 3827849207121 = 776270^2 + 1956489^2 .

It is not a de Polignac number, because 4430444320021 - 2³ = 4430444320013 is a prime.

It is a super-2 number, since 2×4430444320021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4430444320121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788613126 + ... + 788618743.

Almost surely, 2^{4430444320021} is an apocalyptic number.

It is an amenable number.

4430444320021 is a deficient number, since it is larger than the sum of its proper divisors (85170523789).

4430444320021 is an equidigital number, since it uses as much as digits as its factorization.

4430444320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577231975 (or 1577231922 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 4430444320021 its reverse (1200234440344), we get a palindrome (5630678760365).

The spelling of 4430444320021 in words is "four trillion, four hundred thirty billion, four hundred forty-four million, three hundred twenty thousand, twenty-one".