2118863 has 8 divisors (see below), whose sum is σ = 2265408. Its totient is φ = 1974784.

The previous prime is 2118841. The next prime is 2118871. The reversal of 2118863 is 3688112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2118863 - 2⁶ = 2118799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1370 + ... + 2472.

It is an arithmetic number, because the mean of its divisors is an integer number (283176).

2^2118863 is an apocalyptic number.

2118863 is a deficient number, since it is larger than the sum of its proper divisors (146545).

2118863 is a wasteful number, since it uses less digits than its factorization.

2118863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233.

The product of its digits is 2304, while the sum is 29.

The square root of 2118863 is about 1455.6314780878. The cubic root of 2118863 is about 128.4401958437.

The spelling of 2118863 in words is "two million, one hundred eighteen thousand, eight hundred sixty-three".