10444430021 has 4 divisors (see below), whose sum is σ = 10446148044. Its totient is φ = 10442712000.

The previous prime is 10444429991. The next prime is 10444430033. The reversal of 10444430021 is 12003444401.

It is a happy number.

10444430021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2382904225 + 8061525796 = 48815^2 + 89786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10444430021 is a prime.

It is a super-2 number, since 2×10444430021² (a number of 21 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 (10444430621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849860 + ... + 862061.

It is an arithmetic number, because the mean of its divisors is an integer number (2611537011).

Almost surely, 2^10444430021 is an apocalyptic number.

It is an amenable number.

10444430021 is a deficient number, since it is larger than the sum of its proper divisors (1718023).

10444430021 is an equidigital number, since it uses as much as digits as its factorization.

10444430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718022.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 10444430021 its reverse (12003444401), we get a palindrome (22447874422).

The spelling of 10444430021 in words is "ten billion, four hundred forty-four million, four hundred thirty thousand, twenty-one".