1982018 has 4 divisors (see below), whose sum is σ = 2973030. Its totient is φ = 991008.

The previous prime is 1982011. The next prime is 1982021. The reversal of 1982018 is 8102891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8102891 = 113 ⋅71707.

It can be written as a sum of positive squares in only one way, i.e., 1408969 + 573049 = 1187^2 + 757^2 .

It is not an unprimeable number, because it can be changed into a prime (1982011) 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, 495503 + ... + 495506.

2^1982018 is an apocalyptic number.

1982018 is a deficient number, since it is larger than the sum of its proper divisors (991012).

1982018 is an equidigital number, since it uses as much as digits as its factorization.

1982018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991011.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1982018 is about 1407.8416104094. The cubic root of 1982018 is about 125.6133693019.

The spelling of 1982018 in words is "one million, nine hundred eighty-two thousand, eighteen".