21432443522 has 32 divisors (see below), whose sum is σ = 37148805120. Its totient is φ = 9083612160.

The previous prime is 21432443497. The next prime is 21432443551. The reversal of 21432443522 is 22534423412.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1992254 + ... + 2002982.

It is an arithmetic number, because the mean of its divisors is an integer number (1160900160).

Almost surely, 2^21432443522 is an apocalyptic number.

21432443522 is a deficient number, since it is larger than the sum of its proper divisors (15716361598).

21432443522 is a wasteful number, since it uses less digits than its factorization.

21432443522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12306.

The product of its digits is 46080, while the sum is 32.

Adding to 21432443522 its reverse (22534423412), we get a palindrome (43966866934).

The spelling of 21432443522 in words is "twenty-one billion, four hundred thirty-two million, four hundred forty-three thousand, five hundred twenty-two".