18885135 has 16 divisors (see below), whose sum is σ = 30288384. Its totient is φ = 10048032.

The previous prime is 18885121. The next prime is 18885137. The reversal of 18885135 is 53158881.

It is not a de Polignac number, because 18885135 - 2⁵ = 18885103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18885093 and 18885102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18885137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6294 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (1893024).

Almost surely, 2^18885135 is an apocalyptic number.

18885135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18885135 is a deficient number, since it is larger than the sum of its proper divisors (11403249).

18885135 is a wasteful number, since it uses less digits than its factorization.

18885135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014.

The product of its digits is 38400, while the sum is 39.

The square root of 18885135 is about 4345.7030501404. The cubic root of 18885135 is about 266.3013478519.

The spelling of 18885135 in words is "eighteen million, eight hundred eighty-five thousand, one hundred thirty-five".