21433302405 has 16 divisors (see below), whose sum is σ = 38103648960. Its totient is φ = 11431094544.

The previous prime is 21433302361. The next prime is 21433302461. The reversal of 21433302405 is 50420333412.

It is not a de Polignac number, because 21433302405 - 2⁷ = 21433302277 is a prime.

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

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 15 ways as a sum of consecutive naturals, for example, 79382467 + ... + 79382736.

It is an arithmetic number, because the mean of its divisors is an integer number (2381478060).

Almost surely, 2^21433302405 is an apocalyptic number.

It is an amenable number.

21433302405 is a deficient number, since it is larger than the sum of its proper divisors (16670346555).

21433302405 is a wasteful number, since it uses less digits than its factorization.

21433302405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158765217 (or 158765211 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21433302405 its reverse (50420333412), we get a palindrome (71853635817).

The spelling of 21433302405 in words is "twenty-one billion, four hundred thirty-three million, three hundred two thousand, four hundred five".