16908123520 has 128 divisors (see below), whose sum is σ = 41248310400. Its totient is φ = 6626181120.

The previous prime is 16908123487. The next prime is 16908123521. The reversal of 16908123520 is 2532180961.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16908123520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16908123521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6925500 + ... + 6927940.

It is an arithmetic number, because the mean of its divisors is an integer number (322252425).

Almost surely, 2^16908123520 is an apocalyptic number.

16908123520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16908123520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20624155200).

16908123520 is an abundant number, since it is smaller than the sum of its proper divisors (24340186880).

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

16908123520 is a wasteful number, since it uses less digits than its factorization.

16908123520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 16908123520 in words is "sixteen billion, nine hundred eight million, one hundred twenty-three thousand, five hundred twenty".