18898718 has 16 divisors (see below), whose sum is σ = 28800240. Its totient is φ = 9300096.

The previous prime is 18898717. The next prime is 18898721. The reversal of 18898718 is 81789881.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18898717) 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, 43430 + ... + 43862.

It is an arithmetic number, because the mean of its divisors is an integer number (1800015).

Almost surely, 2^18898718 is an apocalyptic number.

18898718 is a deficient number, since it is larger than the sum of its proper divisors (9901522).

18898718 is a wasteful number, since it uses less digits than its factorization.

18898718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its digits is 258048, while the sum is 50.

The square root of 18898718 is about 4347.2655773486. The cubic root of 18898718 is about 266.3651776727.

The spelling of 18898718 in words is "eighteen million, eight hundred ninety-eight thousand, seven hundred eighteen".