18135745 has 8 divisors (see below), whose sum is σ = 21790080. Its totient is φ = 14490480.

The previous prime is 18135721. The next prime is 18135757. The reversal of 18135745 is 54753181.

It is a happy number.

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

It is not a de Polignac number, because 18135745 - 2⁹ = 18135233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18135745.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3450 + ... + 6940.

It is an arithmetic number, because the mean of its divisors is an integer number (2723760).

Almost surely, 2^18135745 is an apocalyptic number.

It is an amenable number.

18135745 is a deficient number, since it is larger than the sum of its proper divisors (3654335).

18135745 is a wasteful number, since it uses less digits than its factorization.

18135745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535.

The product of its digits is 16800, while the sum is 34.

The square root of 18135745 is about 4258.6083407611. The cubic root of 18135745 is about 262.7312912342.

The spelling of 18135745 in words is "eighteen million, one hundred thirty-five thousand, seven hundred forty-five".