21843941898240 has 5760 divisors, whose sum is σ = 109321577164800. Its totient is φ = 4064123289600.

The previous prime is 21843941898217. The next prime is 21843941898329. The reversal of 21843941898240 is 4289814934812.

21843941898240 is a `hidden beast` number, since 2 + 1 + 8 + 439 + 4 + 1 + 89 + 82 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (5760).

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 polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 370236303331 + ... + 370236303389.

It is an arithmetic number, because the mean of its divisors is an integer number (18979440480).

Almost surely, 2^{21843941898240} is an apocalyptic number.

21843941898240 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 21843941898240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54660788582400).

21843941898240 is an abundant number, since it is smaller than the sum of its proper divisors (87477635266560).

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

21843941898240 is a wasteful number, since it uses less digits than its factorization.

21843941898240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The spelling of 21843941898240 in words is "twenty-one trillion, eight hundred forty-three billion, nine hundred forty-one million, eight hundred ninety-eight thousand, two hundred forty".