21232424224 has 24 divisors (see below), whose sum is σ = 45601457328. Its totient is φ = 9651101760.

The previous prime is 21232424221. The next prime is 21232424243. The reversal of 21232424224 is 42242423212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21232424192 and 21232424201.

It is not an unprimeable number, because it can be changed into a prime (21232424221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30159342 + ... + 30160045.

It is an arithmetic number, because the mean of its divisors is an integer number (1900060722).

Almost surely, 2^21232424224 is an apocalyptic number.

It is an amenable number.

21232424224 is an abundant number, since it is smaller than the sum of its proper divisors (24369033104).

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

21232424224 is a wasteful number, since it uses less digits than its factorization.

21232424224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60319408 (or 60319400 counting only the distinct ones).

The product of its digits is 12288, while the sum is 28.

Adding to 21232424224 its reverse (42242423212), we get a palindrome (63474847436).

The spelling of 21232424224 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty-four thousand, two hundred twenty-four".