82021108009 has 8 divisors (see below), whose sum is σ = 82416659328. Its totient is φ = 81625857360.

The previous prime is 82021107997. The next prime is 82021108019. The reversal of 82021108009 is 90080112028.

It is a happy number.

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 82021108009 - 2⁷ = 82021107881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82021108019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481639 + ... + 629299.

It is an arithmetic number, because the mean of its divisors is an integer number (10302082416).

Almost surely, 2^82021108009 is an apocalyptic number.

It is an amenable number.

82021108009 is a deficient number, since it is larger than the sum of its proper divisors (395551319).

82021108009 is a wasteful number, since it uses less digits than its factorization.

82021108009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150335.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 82021108009 in words is "eighty-two billion, twenty-one million, one hundred eight thousand, nine".