18198065 has 8 divisors (see below), whose sum is σ = 21864768. Its totient is φ = 14540400.

The previous prime is 18198053. The next prime is 18198091. The reversal of 18198065 is 56089181.

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

It is not a de Polignac number, because 18198065 - 2⁶ = 18198001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3524 + ... + 6986.

It is an arithmetic number, because the mean of its divisors is an integer number (2733096).

Almost surely, 2^18198065 is an apocalyptic number.

It is an amenable number.

18198065 is a deficient number, since it is larger than the sum of its proper divisors (3666703).

18198065 is a wasteful number, since it uses less digits than its factorization.

18198065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4519.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 18198065 is about 4265.9190100141. The cubic root of 18198065 is about 263.0318890333.

The spelling of 18198065 in words is "eighteen million, one hundred ninety-eight thousand, sixty-five".