820934019108 has 108 divisors (see below), whose sum is σ = 2417298024960. Its totient is φ = 234225994464.

The previous prime is 820934019107. The next prime is 820934019137. The reversal of 820934019108 is 801910439028.

It is not an unprimeable number, because it can be changed into a prime (820934019107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 944685 + ... + 1591947.

It is an arithmetic number, because the mean of its divisors is an integer number (22382389120).

Almost surely, 2^820934019108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 820934019108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208649012480).

820934019108 is an abundant number, since it is smaller than the sum of its proper divisors (1596364005852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820934019108 is a wasteful number, since it uses less digits than its factorization.

820934019108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648006 (or 647994 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 820934019108 in words is "eight hundred twenty billion, nine hundred thirty-four million, nineteen thousand, one hundred eight".