21422223224 has 16 divisors (see below), whose sum is σ = 40190033520. Its totient is φ = 10704880960.

The previous prime is 21422223217. The next prime is 21422223247. The reversal of 21422223224 is 42232222412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21422223193 and 21422223202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764204 + ... + 791739.

It is an arithmetic number, because the mean of its divisors is an integer number (2511877095).

Almost surely, 2^21422223224 is an apocalyptic number.

It is an amenable number.

21422223224 is a deficient number, since it is larger than the sum of its proper divisors (18767810296).

21422223224 is a wasteful number, since it uses less digits than its factorization.

21422223224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557670 (or 1557666 counting only the distinct ones).

The product of its digits is 6144, while the sum is 26.

Adding to 21422223224 its reverse (42232222412), we get a palindrome (63654445636).

The spelling of 21422223224 in words is "twenty-one billion, four hundred twenty-two million, two hundred twenty-three thousand, two hundred twenty-four".