21000322232 has 16 divisors (see below), whose sum is σ = 39378956760. Its totient is φ = 10499267104.

The previous prime is 21000322229. The next prime is 21000322243. The reversal of 21000322232 is 23222300012.

It is a self number, because there is not a number n which added to its sum of digits gives 21000322232.

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, 6038 + ... + 205029.

Almost surely, 2^21000322232 is an apocalyptic number.

It is an amenable number.

21000322232 is a deficient number, since it is larger than the sum of its proper divisors (18378634528).

21000322232 is a wasteful number, since it uses less digits than its factorization.

21000322232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223510 (or 223506 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21000322232 its reverse (23222300012), we get a palindrome (44222622244).

The spelling of 21000322232 in words is "twenty-one billion, three hundred twenty-two thousand, two hundred thirty-two".