21303222224 has 20 divisors (see below), whose sum is σ = 41772284736. Its totient is φ = 10523277792.

The previous prime is 21303222203. The next prime is 21303222271. The reversal of 21303222224 is 42222230312.

It is a self number, because there is not a number n which added to its sum of digits gives 21303222224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8019464 + ... + 8022119.

Almost surely, 2^21303222224 is an apocalyptic number.

It is an amenable number.

21303222224 is a deficient number, since it is larger than the sum of its proper divisors (20469062512).

21303222224 is a wasteful number, since it uses less digits than its factorization.

21303222224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16041674 (or 16041668 counting only the distinct ones).

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

Adding to 21303222224 its reverse (42222230312), we get a palindrome (63525452536).

The spelling of 21303222224 in words is "twenty-one billion, three hundred three million, two hundred twenty-two thousand, two hundred twenty-four".