21442004223 has 8 divisors (see below), whose sum is σ = 29254207488. Its totient is φ = 13962235224.

The previous prime is 21442004209. The next prime is 21442004231. The reversal of 21442004223 is 32240024412.

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

It is not a de Polignac number, because 21442004223 - 2⁵ = 21442004191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21442004193 and 21442004202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442004263) 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, 83108415 + ... + 83108672.

It is an arithmetic number, because the mean of its divisors is an integer number (3656775936).

Almost surely, 2^21442004223 is an apocalyptic number.

21442004223 is a deficient number, since it is larger than the sum of its proper divisors (7812203265).

21442004223 is a wasteful number, since it uses less digits than its factorization.

21442004223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166217133.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21442004223 its reverse (32240024412), we get a palindrome (53682028635).

The spelling of 21442004223 in words is "twenty-one billion, four hundred forty-two million, four thousand, two hundred twenty-three".