21636488847360 has 448 divisors, whose sum is σ = 73381187044800. Its totient is φ = 5424694689792.

The previous prime is 21636488847289. The next prime is 21636488847373. The reversal of 21636488847360 is 6374888463612.

It is a happy number.

It is a super-2 number, since 2×21636488847360² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21636488847291 and 21636488847300.

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 31 ways as a sum of consecutive naturals, for example, 2233093396 + ... + 2233103084.

Almost surely, 2^{21636488847360} is an apocalyptic number.

21636488847360 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 21636488847360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36690593522400).

21636488847360 is an abundant number, since it is smaller than the sum of its proper divisors (51744698197440).

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

21636488847360 is a wasteful number, since it uses less digits than its factorization.

21636488847360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10809 (or 10785 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 66.

The spelling of 21636488847360 in words is "twenty-one trillion, six hundred thirty-six billion, four hundred eighty-eight million, eight hundred forty-seven thousand, three hundred sixty".