18216182 has 4 divisors (see below), whose sum is σ = 27324276. Its totient is φ = 9108090.

The previous prime is 18216181. The next prime is 18216221. The reversal of 18216182 is 28161281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28161281 = 353 ⋅79777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18216181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4554044 + ... + 4554047.

It is an arithmetic number, because the mean of its divisors is an integer number (6831069).

Almost surely, 2^18216182 is an apocalyptic number.

18216182 is a deficient number, since it is larger than the sum of its proper divisors (9108094).

18216182 is an equidigital number, since it uses as much as digits as its factorization.

18216182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9108093.

The product of its digits is 1536, while the sum is 29.

The square root of 18216182 is about 4268.0419398127. The cubic root of 18216182 is about 263.1191468128.

The spelling of 18216182 in words is "eighteen million, two hundred sixteen thousand, one hundred eighty-two".