21432422106 has 12 divisors (see below), whose sum is σ = 46436914602. Its totient is φ = 7144140696.

The previous prime is 21432422071. The next prime is 21432422111. The reversal of 21432422106 is 60122423412.

21432422106 is a `hidden beast` number, since 2 + 1 + 432 + 4 + 221 + 0 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20826819225 + 605602881 = 144315^2 + 24609^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21432422106.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 595345041 + ... + 595345076.

Almost surely, 2^21432422106 is an apocalyptic number.

21432422106 is an abundant number, since it is smaller than the sum of its proper divisors (25004492496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21432422106 is a wasteful number, since it uses less digits than its factorization.

21432422106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190690125 (or 1190690122 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21432422106 its reverse (60122423412), we get a palindrome (81554845518).

It can be divided in two parts, 2143 and 2422106, that added together give a square (2424249 = 1557²).

The spelling of 21432422106 in words is "twenty-one billion, four hundred thirty-two million, four hundred twenty-two thousand, one hundred six".