21422243422 has 16 divisors (see below), whose sum is σ = 34853408352. Its totient is φ = 9835175680.

The previous prime is 21422243417. The next prime is 21422243429. The reversal of 21422243422 is 22434222412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422243429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7682338 + ... + 7685125.

It is an arithmetic number, because the mean of its divisors is an integer number (2178338022).

Almost surely, 2^21422243422 is an apocalyptic number.

21422243422 is a deficient number, since it is larger than the sum of its proper divisors (13431164930).

21422243422 is a wasteful number, since it uses less digits than its factorization.

21422243422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15367523.

The product of its digits is 12288, while the sum is 28.

Adding to 21422243422 its reverse (22434222412), we get a palindrome (43856465834).

The spelling of 21422243422 in words is "twenty-one billion, four hundred twenty-two million, two hundred forty-three thousand, four hundred twenty-two".