21444004222 has 4 divisors (see below), whose sum is σ = 32166006336. Its totient is φ = 10722002110.

The previous prime is 21444004193. The next prime is 21444004261. The reversal of 21444004222 is 22240044412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5361001054 + ... + 5361001057.

It is an arithmetic number, because the mean of its divisors is an integer number (8041501584).

Almost surely, 2^21444004222 is an apocalyptic number.

21444004222 is a deficient number, since it is larger than the sum of its proper divisors (10722002114).

21444004222 is a wasteful number, since it uses less digits than its factorization.

21444004222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722002113.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 21444004222 its reverse (22240044412), we get a palindrome (43684048634).

The spelling of 21444004222 in words is "twenty-one billion, four hundred forty-four million, four thousand, two hundred twenty-two".