18135982 has 8 divisors (see below), whose sum is σ = 27387000. Its totient is φ = 9006984.

The previous prime is 18135979. The next prime is 18136003. The reversal of 18135982 is 28953181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30132 + ... + 30727.

It is an arithmetic number, because the mean of its divisors is an integer number (3423375).

Almost surely, 2^18135982 is an apocalyptic number.

18135982 is a deficient number, since it is larger than the sum of its proper divisors (9251018).

18135982 is a wasteful number, since it uses less digits than its factorization.

18135982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61010.

The product of its digits is 17280, while the sum is 37.

The square root of 18135982 is about 4258.6361666618. The cubic root of 18135982 is about 262.7324356968.

It can be divided in two parts, 181 and 35982, that added together give a palindrome (36163).

The spelling of 18135982 in words is "eighteen million, one hundred thirty-five thousand, nine hundred eighty-two".