21435433117 has 8 divisors (see below), whose sum is σ = 24634497600. Its totient is φ = 18270583584.

The previous prime is 21435433087. The next prime is 21435433121. The reversal of 21435433117 is 71133453412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21435433117 - 2⁷ = 21435432989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435433177) 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 7 ways as a sum of consecutive naturals, for example, 8552392 + ... + 8554897.

It is an arithmetic number, because the mean of its divisors is an integer number (3079312200).

Almost surely, 2^21435433117 is an apocalyptic number.

It is an amenable number.

21435433117 is a deficient number, since it is larger than the sum of its proper divisors (3199064483).

21435433117 is a wasteful number, since it uses less digits than its factorization.

21435433117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17107475.

The product of its digits is 30240, while the sum is 34.

Adding to 21435433117 its reverse (71133453412), we get a palindrome (92568886529).

The spelling of 21435433117 in words is "twenty-one billion, four hundred thirty-five million, four hundred thirty-three thousand, one hundred seventeen".