18868135 has 24 divisors (see below), whose sum is σ = 26812800. Its totient is φ = 12661440.

The previous prime is 18868133. The next prime is 18868139. The reversal of 18868135 is 53186881.

It is not a de Polignac number, because 18868135 - 2¹ = 18868133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6666 + ... + 9064.

It is an arithmetic number, because the mean of its divisors is an integer number (1117200).

Almost surely, 2^18868135 is an apocalyptic number.

18868135 is a deficient number, since it is larger than the sum of its proper divisors (7944665).

18868135 is a wasteful number, since it uses less digits than its factorization.

18868135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439 (or 2428 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 18868135 is about 4343.7466546750. The cubic root of 18868135 is about 266.2214175787.

The spelling of 18868135 in words is "eighteen million, eight hundred sixty-eight thousand, one hundred thirty-five".