16818197 has 8 divisors (see below), whose sum is σ = 18400800. Its totient is φ = 15244560.

The previous prime is 16818187. The next prime is 16818209. The reversal of 16818197 is 79181861.

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

It is a cyclic number.

It is not a de Polignac number, because 16818197 - 2⁶ = 16818133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16818157) 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, 2054 + ... + 6152.

It is an arithmetic number, because the mean of its divisors is an integer number (2300100).

Almost surely, 2^16818197 is an apocalyptic number.

It is an amenable number.

16818197 is a deficient number, since it is larger than the sum of its proper divisors (1582603).

16818197 is a wasteful number, since it uses less digits than its factorization.

16818197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483.

The product of its digits is 24192, while the sum is 41.

The square root of 16818197 is about 4100.9995123140. Note that the first 3 decimals coincide. The cubic root of 16818197 is about 256.2082706588.

The spelling of 16818197 in words is "sixteen million, eight hundred eighteen thousand, one hundred ninety-seven".