21033330332 has 48 divisors (see below), whose sum is σ = 42301651392. Its totient is φ = 8964034560.

The previous prime is 21033330299. The next prime is 21033330347. The reversal of 21033330332 is 23303333012.

It is a junction number, because it is equal to n+sod(n) for n = 21033330298 and 21033330307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6737732 + ... + 6740852.

It is an arithmetic number, because the mean of its divisors is an integer number (881284404).

Almost surely, 2^21033330332 is an apocalyptic number.

It is an amenable number.

21033330332 is an abundant number, since it is smaller than the sum of its proper divisors (21268321060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21033330332 is a wasteful number, since it uses less digits than its factorization.

21033330332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398 (or 4396 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 23.

Adding to 21033330332 its reverse (23303333012), we get a palindrome (44336663344).

The spelling of 21033330332 in words is "twenty-one billion, thirty-three million, three hundred thirty thousand, three hundred thirty-two".