21432234223 has 8 divisors (see below), whose sum is σ = 21491769600. Its totient is φ = 21372739608.

The previous prime is 21432234191. The next prime is 21432234253. The reversal of 21432234223 is 32243223412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21432234223 - 2⁵ = 21432234191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21432234191 and 21432234200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432234253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256490 + ... + 1273432.

It is an arithmetic number, because the mean of its divisors is an integer number (2686471200).

Almost surely, 2^21432234223 is an apocalyptic number.

21432234223 is a deficient number, since it is larger than the sum of its proper divisors (59535377).

21432234223 is a wasteful number, since it uses less digits than its factorization.

21432234223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20381.

The product of its digits is 13824, while the sum is 28.

Adding to 21432234223 its reverse (32243223412), we get a palindrome (53675457635).

The spelling of 21432234223 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-four thousand, two hundred twenty-three".