21943639850496 has 2880 divisors, whose sum is σ = 83591664076800. Its totient is φ = 5072191488000.

The previous prime is 21943639850471. The next prime is 21943639850563. The reversal of 21943639850496 is 69405893634912.

It is a super-2 number, since 2×21943639850496² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21943639850496.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 217263760846 + ... + 217263760946.

It is an arithmetic number, because the mean of its divisors is an integer number (29024883360).

Almost surely, 2^{21943639850496} is an apocalyptic number.

21943639850496 is a gapful number since it is divisible by the number (26) 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 21943639850496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41795832038400).

21943639850496 is an abundant number, since it is smaller than the sum of its proper divisors (61648024226304).

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

21943639850496 is a wasteful number, since it uses less digits than its factorization.

21943639850496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 302330880, while the sum is 69.

The spelling of 21943639850496 in words is "twenty-one trillion, nine hundred forty-three billion, six hundred thirty-nine million, eight hundred fifty thousand, four hundred ninety-six".