21432440110 has 64 divisors (see below), whose sum is σ = 39752016192. Its totient is φ = 8316988416.

The previous prime is 21432440093. The next prime is 21432440137. The reversal of 21432440110 is 1104423412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16782792 + ... + 16784068.

It is an arithmetic number, because the mean of its divisors is an integer number (621125253).

Almost surely, 2^21432440110 is an apocalyptic number.

21432440110 is a deficient number, since it is larger than the sum of its proper divisors (18319576082).

21432440110 is a wasteful number, since it uses less digits than its factorization.

21432440110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21432440110 its reverse (1104423412), we get a palindrome (22536863522).

The spelling of 21432440110 in words is "twenty-one billion, four hundred thirty-two million, four hundred forty thousand, one hundred ten".