18136347 has 8 divisors (see below), whose sum is σ = 24245520. Its totient is φ = 12059040.

The previous prime is 18136319. The next prime is 18136357. The reversal of 18136347 is 74363181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18136347 - 2⁸ = 18136091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18136357) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6604 + ... + 8937.

It is an arithmetic number, because the mean of its divisors is an integer number (3030690).

Almost surely, 2^18136347 is an apocalyptic number.

18136347 is a deficient number, since it is larger than the sum of its proper divisors (6109173).

18136347 is a wasteful number, since it uses less digits than its factorization.

18136347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15933.

The product of its digits is 12096, while the sum is 33.

The square root of 18136347 is about 4258.6790205415. The cubic root of 18136347 is about 262.7341982462.

The spelling of 18136347 in words is "eighteen million, one hundred thirty-six thousand, three hundred forty-seven".