18137982 has 16 divisors (see below), whose sum is σ = 36450432. Its totient is φ = 6016920.

The previous prime is 18137941. The next prime is 18137993. The reversal of 18137982 is 28973181.

It is a self number, because there is not a number n which added to its sum of digits gives 18137982.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 5898 + ... + 8429.

It is an arithmetic number, because the mean of its divisors is an integer number (2278152).

Almost surely, 2^18137982 is an apocalyptic number.

18137982 is an abundant number, since it is smaller than the sum of its proper divisors (18312450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18137982 is a wasteful number, since it uses less digits than its factorization.

18137982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14543.

The product of its digits is 24192, while the sum is 39.

The square root of 18137982 is about 4258.8709771488. The cubic root of 18137982 is about 262.7420932118.

The spelling of 18137982 in words is "eighteen million, one hundred thirty-seven thousand, nine hundred eighty-two".