21233233232 has 20 divisors (see below), whose sum is σ = 41546713236. Its totient is φ = 10511500800.

The previous prime is 21233233199. The next prime is 21233233237. The reversal of 21233233232 is 23233233212.

It can be written as a sum of positive squares in 2 ways, for example, as 18923854096 + 2309379136 = 137564^2 + 48056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233233237) 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, 6568073 + ... + 6571304.

Almost surely, 2^21233233232 is an apocalyptic number.

It is an amenable number.

21233233232 is a deficient number, since it is larger than the sum of its proper divisors (20313480004).

21233233232 is a wasteful number, since it uses less digits than its factorization.

21233233232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13139486 (or 13139480 counting only the distinct ones).

The product of its digits is 7776, while the sum is 26.

Adding to 21233233232 its reverse (23233233212), we get a palindrome (44466466444).

The spelling of 21233233232 in words is "twenty-one billion, two hundred thirty-three million, two hundred thirty-three thousand, two hundred thirty-two".