20743216800 has 144 divisors (see below), whose sum is σ = 67950463392. Its totient is φ = 5496192000.

The previous prime is 20743216789. The next prime is 20743216829. The reversal of 20743216800 is 861234702.

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, 349275 + ... + 404325.

It is an arithmetic number, because the mean of its divisors is an integer number (471878218).

Almost surely, 2^20743216800 is an apocalyptic number.

20743216800 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 20743216800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33975231696).

20743216800 is an abundant number, since it is smaller than the sum of its proper divisors (47207246592).

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

20743216800 is a wasteful number, since it uses less digits than its factorization.

20743216800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55231 (or 55218 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 20743216800 in words is "twenty billion, seven hundred forty-three million, two hundred sixteen thousand, eight hundred".