16820885055 has 32 divisors (see below), whose sum is σ = 29767034304. Its totient is φ = 8057235456.

The previous prime is 16820885033. The next prime is 16820885057. The reversal of 16820885055 is 55058802861.

It is not a de Polignac number, because 16820885055 - 2⁸ = 16820884799 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 16820884995 and 16820885013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16820885057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1158474 + ... + 1172903.

It is an arithmetic number, because the mean of its divisors is an integer number (930219822).

Almost surely, 2^16820885055 is an apocalyptic number.

16820885055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16820885055 is a deficient number, since it is larger than the sum of its proper divisors (12946149249).

16820885055 is a wasteful number, since it uses less digits than its factorization.

16820885055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331435.

The product of its (nonzero) digits is 768000, while the sum is 48.

The spelling of 16820885055 in words is "sixteen billion, eight hundred twenty million, eight hundred eighty-five thousand, fifty-five".