18082771 has 4 divisors (see below), whose sum is σ = 20666032. Its totient is φ = 15499512.

The previous prime is 18082769. The next prime is 18082811. The reversal of 18082771 is 17728081.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18082771 - 2¹ = 18082769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18082711) 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, 1291620 + ... + 1291633.

It is an arithmetic number, because the mean of its divisors is an integer number (5166508).

Almost surely, 2^18082771 is an apocalyptic number.

18082771 is a deficient number, since it is larger than the sum of its proper divisors (2583261).

18082771 is an equidigital number, since it uses as much as digits as its factorization.

18082771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583260.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 18082771 is about 4252.3841548007. The cubic root of 18082771 is about 262.4752315255.

The spelling of 18082771 in words is "eighteen million, eighty-two thousand, seven hundred seventy-one".