21104646082 has 8 divisors (see below), whose sum is σ = 34092120636. Its totient is φ = 9740605872.

The previous prime is 21104646071. The next prime is 21104646083. The reversal of 21104646082 is 28064640112.

It can be written as a sum of positive squares in 2 ways, for example, as 21088557961 + 16088121 = 145219^2 + 4011^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21104646083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405858553 + ... + 405858604.

Almost surely, 2^21104646082 is an apocalyptic number.

21104646082 is a deficient number, since it is larger than the sum of its proper divisors (12987474554).

21104646082 is a wasteful number, since it uses less digits than its factorization.

21104646082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811717172.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 21104646082 in words is "twenty-one billion, one hundred four million, six hundred forty-six thousand, eighty-two".