21433430332 has 12 divisors (see below), whose sum is σ = 37794828456. Its totient is φ = 10634907920.

The previous prime is 21433430321. The next prime is 21433430363. The reversal of 21433430332 is 23303433412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21433430332.

It is a congruent number.

It is an unprimeable number.

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, 20451223 + ... + 20452270.

It is an arithmetic number, because the mean of its divisors is an integer number (3149569038).

Almost surely, 2^21433430332 is an apocalyptic number.

It is an amenable number.

21433430332 is a deficient number, since it is larger than the sum of its proper divisors (16361398124).

21433430332 is a wasteful number, since it uses less digits than its factorization.

21433430332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40903628 (or 40903626 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 21433430332 its reverse (23303433412), we get a palindrome (44736863744).

The spelling of 21433430332 in words is "twenty-one billion, four hundred thirty-three million, four hundred thirty thousand, three hundred thirty-two".