21344000242 has 8 divisors (see below), whose sum is σ = 33899294556. Its totient is φ = 10044235392.

The previous prime is 21344000239. The next prime is 21344000273. The reversal of 21344000242 is 24200044312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20707497801 + 636502441 = 143901^2 + 25229^2 .

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

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, 313882323 + ... + 313882390.

Almost surely, 2^21344000242 is an apocalyptic number.

21344000242 is a deficient number, since it is larger than the sum of its proper divisors (12555294314).

21344000242 is a wasteful number, since it uses less digits than its factorization.

21344000242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627764732.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21344000242 its reverse (24200044312), we get a palindrome (45544044554).

The spelling of 21344000242 in words is "twenty-one billion, three hundred forty-four million, two hundred forty-two", and thus it is an aban number.