21233424423 has 8 divisors (see below), whose sum is σ = 28314118000. Its totient is φ = 14154173568.

The previous prime is 21233424413. The next prime is 21233424437. The reversal of 21233424423 is 32442433212.

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

It is not a de Polignac number, because 21233424423 - 2¹³ = 21233416231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233424403) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 325858 + ... + 385551.

It is an arithmetic number, because the mean of its divisors is an integer number (3539264750).

Almost surely, 2^21233424423 is an apocalyptic number.

21233424423 is a deficient number, since it is larger than the sum of its proper divisors (7080693577).

21233424423 is an equidigital number, since it uses as much as digits as its factorization.

21233424423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721361.

The product of its digits is 27648, while the sum is 30.

Adding to 21233424423 its reverse (32442433212), we get a palindrome (53675857635).

The spelling of 21233424423 in words is "twenty-one billion, two hundred thirty-three million, four hundred twenty-four thousand, four hundred twenty-three".