18000273 has 8 divisors (see below), whose sum is σ = 24558688. Its totient is φ = 11721024.

The previous prime is 18000259. The next prime is 18000319. The reversal of 18000273 is 37200081.

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

It is not a de Polignac number, because 18000273 - 2⁶ = 18000209 is a prime.

It is a Duffinian number.

18000273 is a modest number, since divided by 273 gives 18 as remainder.

It is not an unprimeable number, because it can be changed into a prime (18000473) 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, 69640 + ... + 69897.

It is an arithmetic number, because the mean of its divisors is an integer number (3069836).

Almost surely, 2^18000273 is an apocalyptic number.

It is an amenable number.

18000273 is a deficient number, since it is larger than the sum of its proper divisors (6558415).

18000273 is a wasteful number, since it uses less digits than its factorization.

18000273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139583.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 18000273 is about 4242.6728603558. The cubic root of 18000273 is about 262.0754643446.

The spelling of 18000273 in words is "eighteen million, two hundred seventy-three", and thus it is an aban number.