18021310982 has 4 divisors (see below), whose sum is σ = 27031966476. Its totient is φ = 9010655490.

The previous prime is 18021310981. The next prime is 18021311017. The reversal of 18021310982 is 28901312081.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18021310981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4505327744 + ... + 4505327747.

It is an arithmetic number, because the mean of its divisors is an integer number (6757991619).

Almost surely, 2^18021310982 is an apocalyptic number.

18021310982 is a deficient number, since it is larger than the sum of its proper divisors (9010655494).

18021310982 is an equidigital number, since it uses as much as digits as its factorization.

18021310982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010655493.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 18021310982 in words is "eighteen billion, twenty-one million, three hundred ten thousand, nine hundred eighty-two".