21030243224 has 32 divisors (see below), whose sum is σ = 40578870000. Its totient is φ = 10210354560.

The previous prime is 21030243197. The next prime is 21030243253. The reversal of 21030243224 is 42234203012.

It is a super-2 number, since 2×21030243224² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21030243224.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76514 + ... + 218894.

Almost surely, 2^21030243224 is an apocalyptic number.

It is an amenable number.

21030243224 is a deficient number, since it is larger than the sum of its proper divisors (19548626776).

21030243224 is a wasteful number, since it uses less digits than its factorization.

21030243224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142923 (or 142919 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21030243224 its reverse (42234203012), we get a palindrome (63264446236).

The spelling of 21030243224 in words is "twenty-one billion, thirty million, two hundred forty-three thousand, two hundred twenty-four".