1218133982 has 16 divisors (see below), whose sum is σ = 1978634112. Its totient is φ = 559107360.

The previous prime is 1218133913. The next prime is 1218134039. The reversal of 1218133982 is 2893318121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124718 + ... + 134129.

It is an arithmetic number, because the mean of its divisors is an integer number (123664632).

Almost surely, 2^1218133982 is an apocalyptic number.

1218133982 is a deficient number, since it is larger than the sum of its proper divisors (760500130).

1218133982 is a wasteful number, since it uses less digits than its factorization.

1218133982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259043.

The product of its digits is 20736, while the sum is 38.

The square root of 1218133982 is about 34901.7762012193. The cubic root of 1218133982 is about 1067.9846719127.

The spelling of 1218133982 in words is "one billion, two hundred eighteen million, one hundred thirty-three thousand, nine hundred eighty-two".