18156000 has 192 divisors, whose sum is σ = 63685440. Its totient is φ = 4505600.

The previous prime is 18155981. The next prime is 18156013. The reversal of 18156000 is 65181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203956 + ... + 204044.

It is an arithmetic number, because the mean of its divisors is an integer number (331695).

Almost surely, 2^18156000 is an apocalyptic number.

18156000 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 18156000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31842720).

18156000 is an abundant number, since it is smaller than the sum of its proper divisors (45529440).

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

18156000 is a wasteful number, since it uses less digits than its factorization.

18156000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 18156000 is about 4260.9858014314. The cubic root of 18156000 is about 262.8290657741.

It can be divided in two parts, 1815 and 6000, that multiplied together give a square (10890000 = 3300²).

The spelling of 18156000 in words is "eighteen million, one hundred fifty-six thousand".