20788820983800 has 144 divisors (see below), whose sum is σ = 69861401162280. Its totient is φ = 5540063904000.

The previous prime is 20788820983783. The next prime is 20788820983873. The reversal of 20788820983800 is 838902888702.

20788820983800 is a `hidden beast` number, since 2 + 0 + 78 + 88 + 20 + 98 + 380 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 1016031 + ... + 6527630.

Almost surely, 2^{20788820983800} is an apocalyptic number.

20788820983800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20788820983800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34930700581140).

20788820983800 is an abundant number, since it is smaller than the sum of its proper divisors (49072580178480).

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

20788820983800 is a wasteful number, since it uses less digits than its factorization.

20788820983800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545214 (or 7545202 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 63.

The spelling of 20788820983800 in words is "twenty trillion, seven hundred eighty-eight billion, eight hundred twenty million, nine hundred eighty-three thousand, eight hundred".