16507468820 has 12 divisors (see below), whose sum is σ = 34665684564. Its totient is φ = 6602987520.

The previous prime is 16507468811. The next prime is 16507468837. The reversal of 16507468820 is 2886470561.

It can be written as a sum of positive squares in 2 ways, for example, as 5063176336 + 11444292484 = 71156^2 + 106978^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412686701 + ... + 412686740.

It is an arithmetic number, because the mean of its divisors is an integer number (2888807047).

Almost surely, 2^16507468820 is an apocalyptic number.

16507468820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16507468820 is an abundant number, since it is smaller than the sum of its proper divisors (18158215744).

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

16507468820 is a wasteful number, since it uses less digits than its factorization.

16507468820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825373450 (or 825373448 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 16507468820 in words is "sixteen billion, five hundred seven million, four hundred sixty-eight thousand, eight hundred twenty".