21030033224 has 16 divisors (see below), whose sum is σ = 39479353020. Its totient is φ = 10502205760.

The previous prime is 21030033191. The next prime is 21030033253. The reversal of 21030033224 is 42233003012.

It can be written as a sum of positive squares in 2 ways, for example, as 20773456900 + 256576324 = 144130^2 + 16018^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21030033196 and 21030033205.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1594379 + ... + 1607514.

Almost surely, 2^21030033224 is an apocalyptic number.

It is an amenable number.

21030033224 is a deficient number, since it is larger than the sum of its proper divisors (18449319796).

21030033224 is a wasteful number, since it uses less digits than its factorization.

21030033224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202720 (or 3202716 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21030033224 its reverse (42233003012), we get a palindrome (63263036236).

The spelling of 21030033224 in words is "twenty-one billion, thirty million, thirty-three thousand, two hundred twenty-four".