18538135 has 32 divisors (see below), whose sum is σ = 27993600. Its totient is φ = 11448960.

The previous prime is 18538127. The next prime is 18538139. The reversal of 18538135 is 53183581.

It is not a de Polignac number, because 18538135 - 2³ = 18538127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18538135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18538139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68781 + ... + 69049.

It is an arithmetic number, because the mean of its divisors is an integer number (874800).

Almost surely, 2^18538135 is an apocalyptic number.

18538135 is a deficient number, since it is larger than the sum of its proper divisors (9455465).

18538135 is a wasteful number, since it uses less digits than its factorization.

18538135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its digits is 14400, while the sum is 34.

The square root of 18538135 is about 4305.5934550303. The cubic root of 18538135 is about 264.6602266986.

The spelling of 18538135 in words is "eighteen million, five hundred thirty-eight thousand, one hundred thirty-five".