21299847004800 has 2304 divisors, whose sum is σ = 102798264240000. Its totient is φ = 4257296547840.

The previous prime is 21299847004729. The next prime is 21299847004957. The reversal of 21299847004800 is 840074899212.

21299847004800 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 98 + 4 + 70 + 0 + 480 + 0 = 666.

21299847004800 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1045689016 + ... + 1045709384.

Almost surely, 2^{21299847004800} is an apocalyptic number.

21299847004800 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 21299847004800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51399132120000).

21299847004800 is an abundant number, since it is smaller than the sum of its proper divisors (81498417235200).

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

21299847004800 is a wasteful number, since it uses less digits than its factorization.

21299847004800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20448 (or 20418 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 21299847004800 in words is "twenty-one trillion, two hundred ninety-nine billion, eight hundred forty-seven million, four thousand, eight hundred".