16871409920 has 36 divisors (see below), whose sum is σ = 40412302140. Its totient is φ = 6748563456.

The previous prime is 16871409913. The next prime is 16871410013. The reversal of 16871409920 is 2990417861.

It can be written as a sum of positive squares in 2 ways, for example, as 3718072576 + 13153337344 = 60976^2 + 114688^2 .

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, 6589115 + ... + 6591674.

Almost surely, 2^16871409920 is an apocalyptic number.

16871409920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16871409920 is an abundant number, since it is smaller than the sum of its proper divisors (23540892220).

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

16871409920 is an equidigital number, since it uses as much as digits as its factorization.

16871409920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180810 (or 13180796 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 16871409920 in words is "sixteen billion, eight hundred seventy-one million, four hundred nine thousand, nine hundred twenty".