2118663 has 16 divisors (see below), whose sum is σ = 3168000. Its totient is φ = 1399320.

The previous prime is 2118661. The next prime is 2118667. The reversal of 2118663 is 3668112.

It is not a de Polignac number, because 2118663 - 2¹ = 2118661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2¹⁹ + 1 + 1 + 8 + 6 + 6² + 3¹³ .

It is a congruent number.

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 (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3238 + ... + 3836.

It is an arithmetic number, because the mean of its divisors is an integer number (198000).

2^2118663 is an apocalyptic number.

2118663 is a deficient number, since it is larger than the sum of its proper divisors (1049337).

2118663 is a wasteful number, since it uses less digits than its factorization.

2118663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 733 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2118663 is about 1455.5627777599. The cubic root of 2118663 is about 128.4361545493.

The spelling of 2118663 in words is "two million, one hundred eighteen thousand, six hundred sixty-three".