2118518 has 4 divisors (see below), whose sum is σ = 3177780. Its totient is φ = 1059258.

The previous prime is 2118517. The next prime is 2118527. The reversal of 2118518 is 8158112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 529628 + ... + 529631.

It is an arithmetic number, because the mean of its divisors is an integer number (794445).

2^2118518 is an apocalyptic number.

2118518 is a deficient number, since it is larger than the sum of its proper divisors (1059262).

2118518 is a wasteful number, since it uses less digits than its factorization.

2118518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059261.

The product of its digits is 640, while the sum is 26.

The square root of 2118518 is about 1455.5129679944. The cubic root of 2118518 is about 128.4332244518.

The spelling of 2118518 in words is "two million, one hundred eighteen thousand, five hundred eighteen".