821822023936 has 27 divisors (see below), whose sum is σ = 1640462758851. Its totient is φ = 410903759616.

The previous prime is 821822023909. The next prime is 821822023937. The reversal of 821822023936 is 639320228128.

It is a happy number.

The square root of 821822023936 is 906544.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821822023937) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14476375 + ... + 14533033.

Almost surely, 2^821822023936 is an apocalyptic number.

821822023936 is the 906544-th square number.

It is an amenable number.

821822023936 is a deficient number, since it is larger than the sum of its proper divisors (818640734915).

821822023936 is an frugal number, since it uses more digits than its factorization.

821822023936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113334 (or 56661 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 821822023936 in words is "eight hundred twenty-one billion, eight hundred twenty-two million, twenty-three thousand, nine hundred thirty-six".