21334212423 has 24 divisors (see below), whose sum is σ = 31029425856. Its totient is φ = 14124672000.

The previous prime is 21334212421. The next prime is 21334212443. The reversal of 21334212423 is 32421243312.

21334212423 is a `hidden beast` number, since 21 + 3 + 3 + 4 + 212 + 423 = 666.

It is not a de Polignac number, because 21334212423 - 2¹ = 21334212421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334212421) 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 23 ways as a sum of consecutive naturals, for example, 782623 + ... + 809423.

It is an arithmetic number, because the mean of its divisors is an integer number (1292892744).

Almost surely, 2^21334212423 is an apocalyptic number.

21334212423 is a deficient number, since it is larger than the sum of its proper divisors (9695213433).

21334212423 is a wasteful number, since it uses less digits than its factorization.

21334212423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27415 (or 27412 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 21334212423 its reverse (32421243312), we get a palindrome (53755455735).

The spelling of 21334212423 in words is "twenty-one billion, three hundred thirty-four million, two hundred twelve thousand, four hundred twenty-three".