18148209 has 8 divisors (see below), whose sum is σ = 24286080. Its totient is φ = 12054576.

The previous prime is 18148181. The next prime is 18148217. The reversal of 18148209 is 90284181.

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

It is not a de Polignac number, because 18148209 - 2⁵ = 18148177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18148209.

It is not an unprimeable number, because it can be changed into a prime (18148259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10089 + ... + 11750.

It is an arithmetic number, because the mean of its divisors is an integer number (3035760).

Almost surely, 2^18148209 is an apocalyptic number.

It is an amenable number.

18148209 is a deficient number, since it is larger than the sum of its proper divisors (6137871).

18148209 is a wasteful number, since it uses less digits than its factorization.

18148209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22119.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18148209 is about 4260.0714782736. The cubic root of 18148209 is about 262.7914658215.

The spelling of 18148209 in words is "eighteen million, one hundred forty-eight thousand, two hundred nine".