21232424223 has 24 divisors (see below), whose sum is σ = 31491757440. Its totient is φ = 13779902160.

The previous prime is 21232424221. The next prime is 21232424243. The reversal of 21232424223 is 32242423212.

21232424223 is a `hidden beast` number, since 2 + 1 + 232 + 4 + 2 + 422 + 3 = 666.

It is not a de Polignac number, because 21232424223 - 2¹ = 21232424221 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 139413 + ... + 248798.

It is an arithmetic number, because the mean of its divisors is an integer number (1312156560).

Almost surely, 2^21232424223 is an apocalyptic number.

21232424223 is a deficient number, since it is larger than the sum of its proper divisors (10259333217).

21232424223 is a wasteful number, since it uses less digits than its factorization.

21232424223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388379 (or 388376 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

Adding to 21232424223 its reverse (32242423212), we get a palindrome (53474847435).

The spelling of 21232424223 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty-four thousand, two hundred twenty-three".