16820534718 has 48 divisors (see below), whose sum is σ = 40160680560. Its totient is φ = 5055184512.

The previous prime is 16820534693. The next prime is 16820534729. The reversal of 16820534718 is 81743502861.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 825783 + ... + 845906.

It is an arithmetic number, because the mean of its divisors is an integer number (836680845).

Almost surely, 2^16820534718 is an apocalyptic number.

16820534718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16820534718 is an abundant number, since it is smaller than the sum of its proper divisors (23340145842).

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

16820534718 is a wasteful number, since it uses less digits than its factorization.

16820534718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671753 (or 1671750 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 16820534718 in words is "sixteen billion, eight hundred twenty million, five hundred thirty-four thousand, seven hundred eighteen".