21794244305 has 8 divisors (see below), whose sum is σ = 26163336552. Its totient is φ = 17428566528.

The previous prime is 21794244301. The next prime is 21794244391. The reversal of 21794244305 is 50344249712.

It can be written as a sum of positive squares in 4 ways, for example, as 242829889 + 21551414416 = 15583^2 + 146804^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21794244305 - 2² = 21794244301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21794244301) 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, 839552 + ... + 865121.

It is an arithmetic number, because the mean of its divisors is an integer number (3270417069).

Almost surely, 2^21794244305 is an apocalyptic number.

It is an amenable number.

21794244305 is a deficient number, since it is larger than the sum of its proper divisors (4369092247).

21794244305 is a wasteful number, since it uses less digits than its factorization.

21794244305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707235.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 21794244305 in words is "twenty-one billion, seven hundred ninety-four million, two hundred forty-four thousand, three hundred five".