20844985200 has 480 divisors, whose sum is σ = 77138562816. Its totient is φ = 4766023680.

The previous prime is 20844985199. The next prime is 20844985229. The reversal of 20844985200 is 258944802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22011127 + ... + 22012073.

Almost surely, 2^20844985200 is an apocalyptic number.

20844985200 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 20844985200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38569281408).

20844985200 is an abundant number, since it is smaller than the sum of its proper divisors (56293577616).

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

20844985200 is a wasteful number, since it uses less digits than its factorization.

20844985200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 20844985200 in words is "twenty billion, eight hundred forty-four million, nine hundred eighty-five thousand, two hundred".