21432242441 has 8 divisors (see below), whose sum is σ = 21657667584. Its totient is φ = 21206908800.

The previous prime is 21432242411. The next prime is 21432242443. The reversal of 21432242441 is 14424223412.

It is a happy number.

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 21432242441 - 2²² = 21428048137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21432242443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513716 + ... + 553866.

It is an arithmetic number, because the mean of its divisors is an integer number (2707208448).

Almost surely, 2^21432242441 is an apocalyptic number.

It is an amenable number.

21432242441 is a deficient number, since it is larger than the sum of its proper divisors (225425143).

21432242441 is an equidigital number, since it uses as much as digits as its factorization.

21432242441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45751.

The product of its digits is 12288, while the sum is 29.

Adding to 21432242441 its reverse (14424223412), we get a palindrome (35856465853).

The spelling of 21432242441 in words is "twenty-one billion, four hundred thirty-two million, two hundred forty-two thousand, four hundred forty-one".