20844551200 has 144 divisors (see below), whose sum is σ = 55915483680. Its totient is φ = 7524864000.

The previous prime is 20844551197. The next prime is 20844551201. The reversal of 20844551200 is 215544802.

It is not an unprimeable number, because it can be changed into a prime (20844551201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1214680 + ... + 1231720.

It is an arithmetic number, because the mean of its divisors is an integer number (388301970).

Almost surely, 2^20844551200 is an apocalyptic number.

20844551200 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 20844551200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27957741840).

20844551200 is an abundant number, since it is smaller than the sum of its proper divisors (35070932480).

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

20844551200 is a wasteful number, since it uses less digits than its factorization.

20844551200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17211 (or 17198 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The spelling of 20844551200 in words is "twenty billion, eight hundred forty-four million, five hundred fifty-one thousand, two hundred".