21432041223 has 16 divisors (see below), whose sum is σ = 28695934176. Its totient is φ = 14228213760.

The previous prime is 21432041167. The next prime is 21432041227. The reversal of 21432041223 is 32214023412.

It is a happy number.

It is not a de Polignac number, because 21432041223 - 2⁶ = 21432041159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21432041193 and 21432041202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432041227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687511 + ... + 718007.

It is an arithmetic number, because the mean of its divisors is an integer number (1793495886).

Almost surely, 2^21432041223 is an apocalyptic number.

21432041223 is a deficient number, since it is larger than the sum of its proper divisors (7263892953).

21432041223 is a wasteful number, since it uses less digits than its factorization.

21432041223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31474.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21432041223 its reverse (32214023412), we get a palindrome (53646064635).

The spelling of 21432041223 in words is "twenty-one billion, four hundred thirty-two million, forty-one thousand, two hundred twenty-three".