21422222320 has 80 divisors (see below), whose sum is σ = 50170279968. Its totient is φ = 8506552320.

The previous prime is 21422222279. The next prime is 21422222329. The reversal of 21422222320 is 2322222412.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 21422222291 and 21422222300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422222329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7712772 + ... + 7715548.

Almost surely, 2^21422222320 is an apocalyptic number.

21422222320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422222320 is an abundant number, since it is smaller than the sum of its proper divisors (28748057648).

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

21422222320 is a wasteful number, since it uses less digits than its factorization.

21422222320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458 (or 3452 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21422222320 its reverse (2322222412), we get a palindrome (23744444732).

The spelling of 21422222320 in words is "twenty-one billion, four hundred twenty-two million, two hundred twenty-two thousand, three hundred twenty".