2160018 has 72 divisors (see below), whose sum is σ = 5690880. Its totient is φ = 589680.

The previous prime is 2160017. The next prime is 2160029. The reversal of 2160018 is 8100612.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160017) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27303 + ... + 27381.

It is an arithmetic number, because the mean of its divisors is an integer number (79040).

2^2160018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2160018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2845440).

2160018 is an abundant number, since it is smaller than the sum of its proper divisors (3530862).

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

2160018 is a wasteful number, since it uses less digits than its factorization.

2160018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2160018 is about 1469.6999693815. The cubic root of 2160018 is about 129.2664404734.

The spelling of 2160018 in words is "two million, one hundred sixty thousand, eighteen".