21834236242 has 96 divisors (see below), whose sum is σ = 42560244720. Its totient is φ = 8317048320.

The previous prime is 21834236201. The next prime is 21834236261. The reversal of 21834236242 is 24263243812.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3971646441 + 17862589801 = 63021^2 + 133651^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20578392 + ... + 20579452.

Almost surely, 2^21834236242 is an apocalyptic number.

21834236242 is a deficient number, since it is larger than the sum of its proper divisors (20726008478).

21834236242 is a wasteful number, since it uses less digits than its factorization.

21834236242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676 (or 1669 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The spelling of 21834236242 in words is "twenty-one billion, eight hundred thirty-four million, two hundred thirty-six thousand, two hundred forty-two".