21133433430 has 96 divisors (see below), whose sum is σ = 57957120000. Its totient is φ = 5328058176.

The previous prime is 21133433383. The next prime is 21133433473. The reversal of 21133433430 is 3433433112.

It is a junction number, because it is equal to n+sod(n) for n = 21133433394 and 21133433403.

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 47 ways as a sum of consecutive naturals, for example, 840907 + ... + 865673.

It is an arithmetic number, because the mean of its divisors is an integer number (603720000).

Almost surely, 2^21133433430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21133433430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28978560000).

21133433430 is an abundant number, since it is smaller than the sum of its proper divisors (36823686570).

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

21133433430 is a wasteful number, since it uses less digits than its factorization.

21133433430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25298 (or 25295 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21133433430 its reverse (3433433112), we get a palindrome (24566866542).

The spelling of 21133433430 in words is "twenty-one billion, one hundred thirty-three million, four hundred thirty-three thousand, four hundred thirty".