4442244021 has 24 divisors (see below), whose sum is σ = 6448968344. Its totient is φ = 2946585600.

The previous prime is 4442244019. The next prime is 4442244029. The reversal of 4442244021 is 1204422444.

It can be written as a sum of positive squares in 4 ways, for example, as 1980695025 + 2461548996 = 44505^2 + 49614^2 .

It is not a de Polignac number, because 4442244021 - 2¹ = 4442244019 is a prime.

It is a super-2 number, since 2×4442244021² = 39467063884220496882, which 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 (4442244029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1821615 + ... + 1824051.

Almost surely, 2^4442244021 is an apocalyptic number.

It is an amenable number.

4442244021 is a deficient number, since it is larger than the sum of its proper divisors (2006724323).

4442244021 is a wasteful number, since it uses less digits than its factorization.

4442244021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3381 (or 3378 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

The square root of 4442244021 is about 66650.1614476664. The cubic root of 4442244021 is about 1643.8700025523.

Adding to 4442244021 its reverse (1204422444), we get a palindrome (5646666465).

The spelling of 4442244021 in words is "four billion, four hundred forty-two million, two hundred forty-four thousand, twenty-one".