21433313043 has 20 divisors (see below), whose sum is σ = 32023473768. Its totient is φ = 14286283200.

The previous prime is 21433313003. The next prime is 21433313051. The reversal of 21433313043 is 34031333412.

21433313043 is a `hidden beast` number, since 21 + 4 + 3 + 331 + 304 + 3 = 666.

It is not a de Polignac number, because 21433313043 - 2⁹ = 21433312531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21433312998 and 21433313016.

It is not an unprimeable number, because it can be changed into a prime (21433313003) 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 19 ways as a sum of consecutive naturals, for example, 493768 + ... + 535418.

Almost surely, 2^21433313043 is an apocalyptic number.

21433313043 is a deficient number, since it is larger than the sum of its proper divisors (10590160725).

21433313043 is an equidigital number, since it uses as much as digits as its factorization.

21433313043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48016 (or 48007 counting only the distinct ones).

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

Adding to 21433313043 its reverse (34031333412), we get a palindrome (55464646455).

The spelling of 21433313043 in words is "twenty-one billion, four hundred thirty-three million, three hundred thirteen thousand, forty-three".