20811829800 has 96 divisors (see below), whose sum is σ = 65143241280. Its totient is φ = 5495923200.

The previous prime is 20811829799. The next prime is 20811829817. The reversal of 20811829800 is 892811802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106581 + ... + 230180.

It is an arithmetic number, because the mean of its divisors is an integer number (678575430).

Almost surely, 2^20811829800 is an apocalyptic number.

20811829800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20811829800 is an abundant number, since it is smaller than the sum of its proper divisors (44331411480).

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

20811829800 is a wasteful number, since it uses less digits than its factorization.

20811829800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336883 (or 336874 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The spelling of 20811829800 in words is "twenty billion, eight hundred eleven million, eight hundred twenty-nine thousand, eight hundred".