21424342323 has 8 divisors (see below), whose sum is σ = 29337838288. Its totient is φ = 13896870624.

The previous prime is 21424342319. The next prime is 21424342333. The reversal of 21424342323 is 32324342412.

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

It is not a de Polignac number, because 21424342323 - 2² = 21424342319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21424342333) 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, 96505936 + ... + 96506157.

It is an arithmetic number, because the mean of its divisors is an integer number (3667229786).

Almost surely, 2^21424342323 is an apocalyptic number.

21424342323 is a deficient number, since it is larger than the sum of its proper divisors (7913495965).

21424342323 is a wasteful number, since it uses less digits than its factorization.

21424342323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193012133.

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

Adding to 21424342323 its reverse (32324342412), we get a palindrome (53748684735).

The spelling of 21424342323 in words is "twenty-one billion, four hundred twenty-four million, three hundred forty-two thousand, three hundred twenty-three".