20823668352 has 128 divisors (see below), whose sum is σ = 61521667200. Its totient is φ = 6934118400.

The previous prime is 20823668303. The next prime is 20823668353. The reversal of 20823668352 is 25386632802.

20823668352 is a `hidden beast` number, since 2 + 0 + 8 + 236 + 68 + 352 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 20823668298 and 20823668307.

It is not an unprimeable number, because it can be changed into a prime (20823668353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4203477 + ... + 4208427.

It is an arithmetic number, because the mean of its divisors is an integer number (480638025).

Almost surely, 2^20823668352 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 20823668352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30760833600).

20823668352 is an abundant number, since it is smaller than the sum of its proper divisors (40697998848).

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

20823668352 is a wasteful number, since it uses less digits than its factorization.

20823668352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6191 (or 6173 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 20823668352 in words is "twenty billion, eight hundred twenty-three million, six hundred sixty-eight thousand, three hundred fifty-two".