18350018 has 8 divisors (see below), whose sum is σ = 27567948. Its totient is φ = 9160704.

The previous prime is 18350009. The next prime is 18350023. The reversal of 18350018 is 81005381.

It can be written as a sum of positive squares in 2 ways, for example, as 18344089 + 5929 = 4283^2 + 77^2 .

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, 5471 + ... + 8162.

Almost surely, 2^18350018 is an apocalyptic number.

18350018 is a deficient number, since it is larger than the sum of its proper divisors (9217930).

18350018 is a wasteful number, since it uses less digits than its factorization.

18350018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14308.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 18350018 is about 4283.6920991126. The cubic root of 18350018 is about 263.7619621268.

Adding to 18350018 its reverse (81005381), we get a palindrome (99355399).

The spelling of 18350018 in words is "eighteen million, three hundred fifty thousand, eighteen".