21353422224 has 20 divisors (see below), whose sum is σ = 55163007536. Its totient is φ = 7117807392.

The previous prime is 21353422219. The next prime is 21353422231. The reversal of 21353422224 is 42222435312.

It is a junction number, because it is equal to n+sod(n) for n = 21353422191 and 21353422200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222431434 + ... + 222431529.

Almost surely, 2^21353422224 is an apocalyptic number.

21353422224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21353422224 is an abundant number, since it is smaller than the sum of its proper divisors (33809585312).

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

21353422224 is a wasteful number, since it uses less digits than its factorization.

21353422224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444862974 (or 444862968 counting only the distinct ones).

The product of its digits is 23040, while the sum is 30.

Adding to 21353422224 its reverse (42222435312), we get a palindrome (63575857536).

The spelling of 21353422224 in words is "twenty-one billion, three hundred fifty-three million, four hundred twenty-two thousand, two hundred twenty-four".