21433113241 has 4 divisors (see below), whose sum is σ = 21433416372. Its totient is φ = 21432810112.

The previous prime is 21433113211. The next prime is 21433113257. The reversal of 21433113241 is 14231133412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18115814025 + 3317299216 = 134595^2 + 57596^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433113241 - 2⁵ = 21433113209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433113211) 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 3 ways as a sum of consecutive naturals, for example, 16941 + ... + 207733.

It is an arithmetic number, because the mean of its divisors is an integer number (5358354093).

Almost surely, 2^21433113241 is an apocalyptic number.

It is an amenable number.

21433113241 is a deficient number, since it is larger than the sum of its proper divisors (303131).

21433113241 is a wasteful number, since it uses less digits than its factorization.

21433113241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303130.

The product of its digits is 1728, while the sum is 25.

Adding to 21433113241 its reverse (14231133412), we get a palindrome (35664246653).

The spelling of 21433113241 in words is "twenty-one billion, four hundred thirty-three million, one hundred thirteen thousand, two hundred forty-one".