21444040020422 has 16 divisors (see below), whose sum is σ = 32713106383872. Its totient is φ = 10540541626440.

The previous prime is 21444040020421. The next prime is 21444040020427. The reversal of 21444040020422 is 22402004044412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444040020421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217550678 + ... + 217649225.

It is an arithmetic number, because the mean of its divisors is an integer number (2044569148992).

Almost surely, 2^{21444040020422} is an apocalyptic number.

21444040020422 is a deficient number, since it is larger than the sum of its proper divisors (11269066363450).

21444040020422 is a wasteful number, since it uses less digits than its factorization.

21444040020422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435200323.

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 21444040020422 its reverse (22402004044412), we get a palindrome (43846044064834).

The spelling of 21444040020422 in words is "twenty-one trillion, four hundred forty-four billion, forty million, twenty thousand, four hundred twenty-two".