16820422113550 has 96 divisors (see below), whose sum is σ = 34342013934720. Its totient is φ = 6078649449600.

The previous prime is 16820422113503. The next prime is 16820422113557. The reversal of 16820422113550 is 5531122402861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16820422113557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68772577 + ... + 69016723.

It is an arithmetic number, because the mean of its divisors is an integer number (357729311820).

Almost surely, 2^{16820422113550} is an apocalyptic number.

16820422113550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16820422113550 is an abundant number, since it is smaller than the sum of its proper divisors (17521591821170).

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

16820422113550 is a wasteful number, since it uses less digits than its factorization.

16820422113550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244946 (or 244941 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 16820422113550 in words is "sixteen trillion, eight hundred twenty billion, four hundred twenty-two million, one hundred thirteen thousand, five hundred fifty".