18136305 has 96 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 8268480.

The previous prime is 18136277. The next prime is 18136319. The reversal of 18136305 is 50363181.

18136305 is a `hidden beast` number, since 18 + 13 + 630 + 5 = 666.

It is not a de Polignac number, because 18136305 - 2⁵ = 18136273 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 307366 + ... + 307424.

It is an arithmetic number, because the mean of its divisors is an integer number (393120).

Almost surely, 2^18136305 is an apocalyptic number.

18136305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18136305 is an abundant number, since it is smaller than the sum of its proper divisors (19603215).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18136305 is a wasteful number, since it uses less digits than its factorization.

18136305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 18136305 is about 4258.6740894321. The cubic root of 18136305 is about 262.7339954335.

Adding to 18136305 its reverse (50363181), we get a palindrome (68499486).

It can be divided in two parts, 1813 and 6305, that added together give a palindrome (8118).

The spelling of 18136305 in words is "eighteen million, one hundred thirty-six thousand, three hundred five".