21344212342 has 8 divisors (see below), whose sum is σ = 32017422816. Its totient is φ = 10671738072.

The previous prime is 21344212327. The next prime is 21344212361. The reversal of 21344212342 is 24321244312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21344212342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104733 + ... + 231640.

It is an arithmetic number, because the mean of its divisors is an integer number (4002177852).

Almost surely, 2^21344212342 is an apocalyptic number.

21344212342 is a deficient number, since it is larger than the sum of its proper divisors (10673210474).

21344212342 is a wasteful number, since it uses less digits than its factorization.

21344212342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368102.

The product of its digits is 9216, while the sum is 28.

Adding to 21344212342 its reverse (24321244312), we get a palindrome (45665456654).

The spelling of 21344212342 in words is "twenty-one billion, three hundred forty-four million, two hundred twelve thousand, three hundred forty-two".