18982273 has 4 divisors (see below), whose sum is σ = 19981360. Its totient is φ = 17983188.

The previous prime is 18982267. The next prime is 18982279. The reversal of 18982273 is 37228981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (18982267) and next prime (18982279).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18982273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18982279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499515 + ... + 499552.

It is an arithmetic number, because the mean of its divisors is an integer number (4995340).

Almost surely, 2^18982273 is an apocalyptic number.

It is an amenable number.

18982273 is a deficient number, since it is larger than the sum of its proper divisors (999087).

18982273 is an equidigital number, since it uses as much as digits as its factorization.

18982273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999086.

The product of its digits is 48384, while the sum is 40.

The square root of 18982273 is about 4356.8650426654. The cubic root of 18982273 is about 266.7571517585.

The spelling of 18982273 in words is "eighteen million, nine hundred eighty-two thousand, two hundred seventy-three".