21432303242 has 16 divisors (see below), whose sum is σ = 37097803392. Its totient is φ = 9096094800.

The previous prime is 21432303229. The next prime is 21432303247. The reversal of 21432303242 is 24230323412.

It is not an unprimeable number, because it can be changed into a prime (21432303247) 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, 7430009 + ... + 7432892.

It is an arithmetic number, because the mean of its divisors is an integer number (2318612712).

Almost surely, 2^21432303242 is an apocalyptic number.

21432303242 is a deficient number, since it is larger than the sum of its proper divisors (15665500150).

21432303242 is a wasteful number, since it uses less digits than its factorization.

21432303242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14863013.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21432303242 its reverse (24230323412), we get a palindrome (45662626654).

The spelling of 21432303242 in words is "twenty-one billion, four hundred thirty-two million, three hundred three thousand, two hundred forty-two".