21336996844800 has 5184 divisors, whose sum is σ = 104526876518400. Its totient is φ = 4238902886400.

The previous prime is 21336996844729. The next prime is 21336996844907. The reversal of 21336996844800 is 844869963312.

21336996844800 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 6 + 99 + 68 + 4 + 480 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 575 ways as a sum of consecutive naturals, for example, 576675590382 + ... + 576675590418.

Almost surely, 2^{21336996844800} is an apocalyptic number.

21336996844800 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 21336996844800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52263438259200).

21336996844800 is an abundant number, since it is smaller than the sum of its proper divisors (83189879673600).

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

21336996844800 is a wasteful number, since it uses less digits than its factorization.

21336996844800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 63.

The spelling of 21336996844800 in words is "twenty-one trillion, three hundred thirty-six billion, nine hundred ninety-six million, eight hundred forty-four thousand, eight hundred".