15920 has 20 divisors (see below), whose sum is σ = 37200. Its totient is φ = 6336.

The previous prime is 15919. The next prime is 15923. The reversal of 15920 is 2951.

15920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 179.

It is an arithmetic number, because the mean of its divisors is an integer number (1860).

2¹⁵⁹²⁰ is an apocalyptic number.

15920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15920 is an abundant number, since it is smaller than the sum of its proper divisors (21280).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18600).

15920 is a wasteful number, since it uses less digits than its factorization.

15920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 15920 is about 126.1744823647. The cubic root of 15920 is about 25.1563534389.

The spelling of 15920 in words is "fifteen thousand, nine hundred twenty".