21422224144 has 40 divisors (see below), whose sum is σ = 44216768160. Its totient is φ = 10019179008.

The previous prime is 21422224133. The next prime is 21422224171. The reversal of 21422224144 is 44142222412.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197254 + ... + 285925.

It is an arithmetic number, because the mean of its divisors is an integer number (1105419204).

Almost surely, 2^21422224144 is an apocalyptic number.

It is an amenable number.

21422224144 is an abundant number, since it is smaller than the sum of its proper divisors (22794544016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21422224144 is a wasteful number, since it uses less digits than its factorization.

21422224144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483367 (or 483361 counting only the distinct ones).

The product of its digits is 8192, while the sum is 28.

Adding to 21422224144 its reverse (44142222412), we get a palindrome (65564446556).

The spelling of 21422224144 in words is "twenty-one billion, four hundred twenty-two million, two hundred twenty-four thousand, one hundred forty-four".