18198670 has 64 divisors (see below), whose sum is σ = 40715136. Its totient is φ = 5713920.

The previous prime is 18198659. The next prime is 18198683. The reversal of 18198670 is 7689181.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48604 + ... + 48976.

It is an arithmetic number, because the mean of its divisors is an integer number (636174).

Almost surely, 2^18198670 is an apocalyptic number.

18198670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18198670 is an abundant number, since it is smaller than the sum of its proper divisors (22516466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18198670 is a wasteful number, since it uses less digits than its factorization.

18198670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 18198670 is about 4265.9899202881. The cubic root of 18198670 is about 263.0348038584.

The spelling of 18198670 in words is "eighteen million, one hundred ninety-eight thousand, six hundred seventy".