21422020442442 has 16 divisors (see below), whose sum is σ = 42915566836800. Its totient is φ = 7128752488832.

The previous prime is 21422020442441. The next prime is 21422020442479. The reversal of 21422020442442 is 24424402022412.

It is not an unprimeable number, because it can be changed into a prime (21422020442441) 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, 2980244103 + ... + 2980251290.

It is an arithmetic number, because the mean of its divisors is an integer number (2682222927300).

Almost surely, 2^{21422020442442} is an apocalyptic number.

21422020442442 is an abundant number, since it is smaller than the sum of its proper divisors (21493546394358).

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

21422020442442 is a wasteful number, since it uses less digits than its factorization.

21422020442442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960495997.

The product of its (nonzero) digits is 65536, while the sum is 33.

Adding to 21422020442442 its reverse (24424402022412), we get a palindrome (45846422464854).

The spelling of 21422020442442 in words is "twenty-one trillion, four hundred twenty-two billion, twenty million, four hundred forty-two thousand, four hundred forty-two".