21081330456482 has 8 divisors (see below), whose sum is σ = 33482113077996. Its totient is φ = 9920626097152.

The previous prime is 21081330456443. The next prime is 21081330456491. The reversal of 21081330456482 is 28465403318012.

It is a Cunningham number, because it is equal to 4591441²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 21081330456481 + 1 = 4591441^2 + 1^2 .

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, 310019565503 + ... + 310019565570.

Almost surely, 2^{21081330456482} is an apocalyptic number.

21081330456482 is a deficient number, since it is larger than the sum of its proper divisors (12400782621514).

21081330456482 is a wasteful number, since it uses less digits than its factorization.

21081330456482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620039131092.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 21081330456482 in words is "twenty-one trillion, eighty-one billion, three hundred thirty million, four hundred fifty-six thousand, four hundred eighty-two".