821041673922 has 30 divisors (see below), whose sum is σ = 1839767371299. Its totient is φ = 273676713660.

The previous prime is 821041673917. The next prime is 821041673927. The reversal of 821041673922 is 229376140128.

821041673922 is a `hidden beast` number, since 8 + 210 + 41 + 6 + 7 + 392 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (821041673917) and next prime (821041673927).

It can be written as a sum of positive squares in only one way, i.e., 410520836961 + 410520836961 = 640719^2 + 640719^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=640719.

It is not an unprimeable number, because it can be changed into a prime (821041673927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 11497347 + ... + 11568537.

Almost surely, 2^821041673922 is an apocalyptic number.

821041673922 is an abundant number, since it is smaller than the sum of its proper divisors (1018725697377).

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

821041673922 is an frugal number, since it uses more digits than its factorization.

821041673922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142396 (or 71196 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 821041673922 in words is "eight hundred twenty-one billion, forty-one million, six hundred seventy-three thousand, nine hundred twenty-two".