18210982 has 4 divisors (see below), whose sum is σ = 27316476. Its totient is φ = 9105490.

The previous prime is 18210977. The next prime is 18210989. The reversal of 18210982 is 28901281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28901281 = 79 ⋅365839.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18210989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4552744 + ... + 4552747.

It is an arithmetic number, because the mean of its divisors is an integer number (6829119).

Almost surely, 2^18210982 is an apocalyptic number.

18210982 is a deficient number, since it is larger than the sum of its proper divisors (9105494).

18210982 is an equidigital number, since it uses as much as digits as its factorization.

18210982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105493.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18210982 is about 4267.4327176887. The cubic root of 18210982 is about 263.0941077244.

The spelling of 18210982 in words is "eighteen million, two hundred ten thousand, nine hundred eighty-two".