4503444021 has 8 divisors (see below), whose sum is σ = 6671768960. Its totient is φ = 3002295996.

The previous prime is 4503443993. The next prime is 4503444089. The reversal of 4503444021 is 1204443054.

It is a happy number.

4503444021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4503444021 - 2¹⁸ = 4503181877 is a prime.

It is a super-3 number, since 3×4503444021³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 166794223 = 4503444021 / (4 + 5 + 0 + 3 + 4 + 4 + 4 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4503444521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83397085 + ... + 83397138.

It is an arithmetic number, because the mean of its divisors is an integer number (833971120).

Almost surely, 2^4503444021 is an apocalyptic number.

It is an amenable number.

4503444021 is a deficient number, since it is larger than the sum of its proper divisors (2168324939).

4503444021 is a wasteful number, since it uses less digits than its factorization.

4503444021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166794232 (or 166794226 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 4503444021 is about 67107.7046321806. The cubic root of 4503444021 is about 1651.3846987770.

Adding to 4503444021 its reverse (1204443054), we get a palindrome (5707887075).

The spelling of 4503444021 in words is "four billion, five hundred three million, four hundred forty-four thousand, twenty-one".