21422403422443 has 8 divisors (see below), whose sum is σ = 21813672269312. Its totient is φ = 21034612521216.

The previous prime is 21422403422393. The next prime is 21422403422473. The reversal of 21422403422443 is 34422430422412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21422403422443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21422403422473) 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, 869473980 + ... + 869498617.

It is an arithmetic number, because the mean of its divisors is an integer number (2726709033664).

Almost surely, 2^{21422403422443} is an apocalyptic number.

21422403422443 is a deficient number, since it is larger than the sum of its proper divisors (391268846869).

21422403422443 is a wasteful number, since it uses less digits than its factorization.

21422403422443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738972821.

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 21422403422443 its reverse (34422430422412), we get a palindrome (55844833844855).

The spelling of 21422403422443 in words is "twenty-one trillion, four hundred twenty-two billion, four hundred three million, four hundred twenty-two thousand, four hundred forty-three".