21843558686160 has 640 divisors, whose sum is σ = 80473363660800. Its totient is φ = 5436895426560.

The previous prime is 21843558686113. The next prime is 21843558686203. The reversal of 21843558686160 is 6168685534812.

21843558686160 is a `hidden beast` number, since 2 + 1 + 8 + 4 + 3 + 5 + 5 + 8 + 6 + 8 + 616 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 209331759 + ... + 209436081.

It is an arithmetic number, because the mean of its divisors is an integer number (125739630720).

Almost surely, 2^{21843558686160} is an apocalyptic number.

21843558686160 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 21843558686160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40236681830400).

21843558686160 is an abundant number, since it is smaller than the sum of its proper divisors (58629804974640).

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

21843558686160 is a wasteful number, since it uses less digits than its factorization.

21843558686160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104488 (or 104476 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 63.

The spelling of 21843558686160 in words is "twenty-one trillion, eight hundred forty-three billion, five hundred fifty-eight million, six hundred eighty-six thousand, one hundred sixty".