18798418 has 8 divisors (see below), whose sum is σ = 28885500. Its totient is φ = 9169920.

The previous prime is 18798397. The next prime is 18798463. The reversal of 18798418 is 81489781.

It can be written as a sum of positive squares in 2 ways, for example, as 11812969 + 6985449 = 3437^2 + 2643^2 .

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

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, 114543 + ... + 114706.

Almost surely, 2^18798418 is an apocalyptic number.

18798418 is a deficient number, since it is larger than the sum of its proper divisors (10087082).

18798418 is a wasteful number, since it uses less digits than its factorization.

18798418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229292.

The product of its digits is 129024, while the sum is 46.

The square root of 18798418 is about 4335.7142433514. The cubic root of 18798418 is about 265.8931204208.

The spelling of 18798418 in words is "eighteen million, seven hundred ninety-eight thousand, four hundred eighteen".