21433340133 has 12 divisors (see below), whose sum is σ = 31421348608. Its totient is φ = 14075625960.

The previous prime is 21433340107. The next prime is 21433340141. The reversal of 21433340133 is 33104333412.

It is not a de Polignac number, because 21433340133 - 2⁶ = 21433340069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21433340097 and 21433340106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433340333) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 17771653 + ... + 17772858.

Almost surely, 2^21433340133 is an apocalyptic number.

It is an amenable number.

21433340133 is a deficient number, since it is larger than the sum of its proper divisors (9988008475).

21433340133 is a wasteful number, since it uses less digits than its factorization.

21433340133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35544584 (or 35544581 counting only the distinct ones).

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

Adding to 21433340133 its reverse (33104333412), we get a palindrome (54537673545).

The spelling of 21433340133 in words is "twenty-one billion, four hundred thirty-three million, three hundred forty thousand, one hundred thirty-three".