21433342401 has 6 divisors (see below), whose sum is σ = 30959272370. Its totient is φ = 14288894928.

The previous prime is 21433342393. The next prime is 21433342451. The reversal of 21433342401 is 10424333412.

21433342401 is a `hidden beast` number, since 214 + 3 + 3 + 3 + 42 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16589182401 + 4844160000 = 128799^2 + 69600^2 .

It is not a de Polignac number, because 21433342401 - 2³ = 21433342393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21433342451) 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 5 ways as a sum of consecutive naturals, for example, 1190741236 + ... + 1190741253.

Almost surely, 2^21433342401 is an apocalyptic number.

It is an amenable number.

21433342401 is a deficient number, since it is larger than the sum of its proper divisors (9525929969).

21433342401 is a wasteful number, since it uses less digits than its factorization.

21433342401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381482495 (or 2381482492 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21433342401 its reverse (10424333412), we get a palindrome (31857675813).

The spelling of 21433342401 in words is "twenty-one billion, four hundred thirty-three million, three hundred forty-two thousand, four hundred one".