21404224422 has 24 divisors (see below), whose sum is σ = 53000936976. Its totient is φ = 6115492656.

The previous prime is 21404224421. The next prime is 21404224453. The reversal of 21404224422 is 22442240412.

21404224422 is a `hidden beast` number, since 2 + 14 + 0 + 4 + 224 + 422 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404224421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84937273 + ... + 84937524.

It is an arithmetic number, because the mean of its divisors is an integer number (2208372374).

Almost surely, 2^21404224422 is an apocalyptic number.

21404224422 is an abundant number, since it is smaller than the sum of its proper divisors (31596712554).

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

21404224422 is a wasteful number, since it uses less digits than its factorization.

21404224422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169874812 (or 169874809 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 21404224422 its reverse (22442240412), we get a palindrome (43846464834).

The spelling of 21404224422 in words is "twenty-one billion, four hundred four million, two hundred twenty-four thousand, four hundred twenty-two".