18818918 has 8 divisors (see below), whose sum is σ = 28917000. Its totient is φ = 9179920.

The previous prime is 18818909. The next prime is 18818923. The reversal of 18818918 is 81981881.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114668 + ... + 114831.

It is an arithmetic number, because the mean of its divisors is an integer number (3614625).

Almost surely, 2^18818918 is an apocalyptic number.

18818918 is a deficient number, since it is larger than the sum of its proper divisors (10098082).

18818918 is a wasteful number, since it uses less digits than its factorization.

18818918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229542.

The product of its digits is 36864, while the sum is 44.

The square root of 18818918 is about 4338.0776848738. The cubic root of 18818918 is about 265.9897389902.

The spelling of 18818918 in words is "eighteen million, eight hundred eighteen thousand, nine hundred eighteen".