16872865920 has 128 divisors (see below), whose sum is σ = 59758128000. Its totient is φ = 4499426304.

The previous prime is 16872865901. The next prime is 16872865937. The reversal of 16872865920 is 2956827861.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470940 + ... + 505499.

It is an arithmetic number, because the mean of its divisors is an integer number (466860375).

Almost surely, 2^16872865920 is an apocalyptic number.

16872865920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16872865920 is an abundant number, since it is smaller than the sum of its proper divisors (42885262080).

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

16872865920 is an equidigital number, since it uses as much as digits as its factorization.

16872865920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976467 (or 976449 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 16872865920 in words is "sixteen billion, eight hundred seventy-two million, eight hundred sixty-five thousand, nine hundred twenty".