18135711 has 32 divisors (see below), whose sum is σ = 29548800. Its totient is φ = 10902240.

The previous prime is 18135703. The next prime is 18135721. The reversal of 18135711 is 11753181.

It is not a de Polignac number, because 18135711 - 2³ = 18135703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18135721) 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, 67285 + ... + 67553.

It is an arithmetic number, because the mean of its divisors is an integer number (923400).

Almost surely, 2^18135711 is an apocalyptic number.

18135711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18135711 is a deficient number, since it is larger than the sum of its proper divisors (11413089).

18135711 is a wasteful number, since it uses less digits than its factorization.

18135711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 510 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 18135711 is about 4258.6043488448. The cubic root of 18135711 is about 262.7311270489.

Adding to 18135711 its reverse (11753181), we get a palindrome (29888892).

The spelling of 18135711 in words is "eighteen million, one hundred thirty-five thousand, seven hundred eleven".