21440243343422 has 8 divisors (see below), whose sum is σ = 32168002255272. Its totient is φ = 10717575925000.

The previous prime is 21440243343413. The next prime is 21440243343427. The reversal of 21440243343422 is 22434334204412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440243343427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272862829 + ... + 1272879672.

It is an arithmetic number, because the mean of its divisors is an integer number (4021000281909).

Almost surely, 2^{21440243343422} is an apocalyptic number.

21440243343422 is a deficient number, since it is larger than the sum of its proper divisors (10727758911850).

21440243343422 is a wasteful number, since it uses less digits than its factorization.

21440243343422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545746714.

The product of its (nonzero) digits is 442368, while the sum is 38.

Adding to 21440243343422 its reverse (22434334204412), we get a palindrome (43874577547834).

The spelling of 21440243343422 in words is "twenty-one trillion, four hundred forty billion, two hundred forty-three million, three hundred forty-three thousand, four hundred twenty-two".