21846334868 has 24 divisors (see below), whose sum is σ = 39566114280. Its totient is φ = 10542049280.

The previous prime is 21846334837. The next prime is 21846334877. The reversal of 21846334868 is 86843364812.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1871600644 + 19974734224 = 43262^2 + 141332^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244580 + ... + 321732.

It is an arithmetic number, because the mean of its divisors is an integer number (1648588095).

Almost surely, 2^21846334868 is an apocalyptic number.

It is an amenable number.

21846334868 is a deficient number, since it is larger than the sum of its proper divisors (17719779412).

21846334868 is a wasteful number, since it uses less digits than its factorization.

21846334868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79627 (or 79625 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 53.

The spelling of 21846334868 in words is "twenty-one billion, eight hundred forty-six million, three hundred thirty-four thousand, eight hundred sixty-eight".