16686620020 has 48 divisors (see below), whose sum is σ = 40087918080. Its totient is φ = 5715408384.

The previous prime is 16686619997. The next prime is 16686620029. The reversal of 16686620020 is 2002668661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16686620029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82197 + ... + 200323.

It is an arithmetic number, because the mean of its divisors is an integer number (835164960).

Almost surely, 2^16686620020 is an apocalyptic number.

16686620020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16686620020 is an abundant number, since it is smaller than the sum of its proper divisors (23401298060).

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

16686620020 is a wasteful number, since it uses less digits than its factorization.

16686620020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119152 (or 119150 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 16686620020 in words is "sixteen billion, six hundred eighty-six million, six hundred twenty thousand, twenty".