21044033224 has 16 divisors (see below), whose sum is σ = 41534276400. Its totient is φ = 9968226192.

The previous prime is 21044033221. The next prime is 21044033233. The reversal of 21044033224 is 42233044012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21044033221) 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, 69223642 + ... + 69223945.

It is an arithmetic number, because the mean of its divisors is an integer number (2595892275).

Almost surely, 2^21044033224 is an apocalyptic number.

It is an amenable number.

21044033224 is a deficient number, since it is larger than the sum of its proper divisors (20490243176).

21044033224 is a wasteful number, since it uses less digits than its factorization.

21044033224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138447612 (or 138447608 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21044033224 its reverse (42233044012), we get a palindrome (63277077236).

The spelling of 21044033224 in words is "twenty-one billion, forty-four million, thirty-three thousand, two hundred twenty-four".