21432233441 has 8 divisors (see below), whose sum is σ = 21998125800. Its totient is φ = 20868396160.

The previous prime is 21432233393. The next prime is 21432233443. The reversal of 21432233441 is 14433223412.

It can be written as a sum of positive squares in 4 ways, for example, as 6645673441 + 14786560000 = 81521^2 + 121600^2 .

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 21432233441 - 2¹⁴ = 21432217057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432233443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492626 + ... + 534363.

It is an arithmetic number, because the mean of its divisors is an integer number (2749765725).

Almost surely, 2^21432233441 is an apocalyptic number.

It is an amenable number.

21432233441 is a deficient number, since it is larger than the sum of its proper divisors (565892359).

21432233441 is a wasteful number, since it uses less digits than its factorization.

21432233441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027539.

The product of its digits is 13824, while the sum is 29.

Adding to 21432233441 its reverse (14433223412), we get a palindrome (35865456853).

The spelling of 21432233441 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-three thousand, four hundred forty-one".