18156960 has 144 divisors (see below), whose sum is σ = 64393056. Its totient is φ = 4831488.

The previous prime is 18156949. The next prime is 18156961. The reversal of 18156960 is 6965181.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18156961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38647 + ... + 39113.

It is an arithmetic number, because the mean of its divisors is an integer number (447174).

Almost surely, 2^18156960 is an apocalyptic number.

18156960 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 18156960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32196528).

18156960 is an abundant number, since it is smaller than the sum of its proper divisors (46236096).

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

18156960 is an equidigital number, since it uses as much as digits as its factorization.

18156960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 18156960 is about 4261.0984499305. The cubic root of 18156960 is about 262.8336980620.

The spelling of 18156960 in words is "eighteen million, one hundred fifty-six thousand, nine hundred sixty".