18955135 has 4 divisors (see below), whose sum is σ = 22746168. Its totient is φ = 15164104.

The previous prime is 18955127. The next prime is 18955163. The reversal of 18955135 is 53155981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53155981 = 1669 ⋅31849.

It is a cyclic number.

It is not a de Polignac number, because 18955135 - 2³ = 18955127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18955094 and 18955103.

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, 1895509 + ... + 1895518.

It is an arithmetic number, because the mean of its divisors is an integer number (5686542).

Almost surely, 2^18955135 is an apocalyptic number.

18955135 is a deficient number, since it is larger than the sum of its proper divisors (3791033).

18955135 is an equidigital number, since it uses as much as digits as its factorization.

18955135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791032.

The product of its digits is 27000, while the sum is 37.

The square root of 18955135 is about 4353.7495334482. The cubic root of 18955135 is about 266.6299680400.

The spelling of 18955135 in words is "eighteen million, nine hundred fifty-five thousand, one hundred thirty-five".