2118660 has 24 divisors (see below), whose sum is σ = 5932416. Its totient is φ = 564960.

The previous prime is 2118643. The next prime is 2118661. The reversal of 2118660 is 668112.

It is a self number, because there is not a number n which added to its sum of digits gives 2118660.

It is not an unprimeable number, because it can be changed into a prime (2118661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17596 + ... + 17715.

It is an arithmetic number, because the mean of its divisors is an integer number (247184).

2^2118660 is an apocalyptic number.

2118660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118660 is an abundant number, since it is smaller than the sum of its proper divisors (3813756).

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

2118660 is a wasteful number, since it uses less digits than its factorization.

2118660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35323 (or 35321 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2118660 is about 1455.5617472303. The cubic root of 2118660 is about 128.4360939279.

It can be divided in two parts, 21 and 18660, that added together give a palindrome (18681).

The spelling of 2118660 in words is "two million, one hundred eighteen thousand, six hundred sixty".