18120273 has 8 divisors (see below), whose sum is σ = 24993600. Its totient is φ = 11663568.

The previous prime is 18120259. The next prime is 18120287. The reversal of 18120273 is 37202181.

It is an interprime number because it is at equal distance from previous prime (18120259) and next prime (18120287).

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

It is not a de Polignac number, because 18120273 - 2⁵ = 18120241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18120203) 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, 104053 + ... + 104226.

It is an arithmetic number, because the mean of its divisors is an integer number (3124200).

Almost surely, 2^18120273 is an apocalyptic number.

It is an amenable number.

18120273 is a deficient number, since it is larger than the sum of its proper divisors (6873327).

18120273 is a wasteful number, since it uses less digits than its factorization.

18120273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208311.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 18120273 is about 4256.7913972850. The cubic root of 18120273 is about 262.6565560439.

The spelling of 18120273 in words is "eighteen million, one hundred twenty thousand, two hundred seventy-three".