18086197 has 8 divisors (see below), whose sum is σ = 18579456. Its totient is φ = 17598672.

The previous prime is 18086183. The next prime is 18086203. The reversal of 18086197 is 79168081.

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 18086197 - 2⁷ = 18086069 is a prime.

It is a super-2 number, since 2×18086197² = 654221043845618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18086137) 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, 5388 + ... + 8074.

It is an arithmetic number, because the mean of its divisors is an integer number (2322432).

Almost surely, 2^18086197 is an apocalyptic number.

It is an amenable number.

18086197 is a deficient number, since it is larger than the sum of its proper divisors (493259).

18086197 is a wasteful number, since it uses less digits than its factorization.

18086197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867.

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

The square root of 18086197 is about 4252.7869685654. The cubic root of 18086197 is about 262.4918068493.

The spelling of 18086197 in words is "eighteen million, eighty-six thousand, one hundred ninety-seven".