18132247 has 8 divisors (see below), whose sum is σ = 20750336. Its totient is φ = 15521112.

The previous prime is 18132239. The next prime is 18132253. The reversal of 18132247 is 74223181.

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

It is a cyclic number.

It is not a de Polignac number, because 18132247 - 2³ = 18132239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18132287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6418 + ... + 8800.

It is an arithmetic number, because the mean of its divisors is an integer number (2593792).

Almost surely, 2^18132247 is an apocalyptic number.

18132247 is a deficient number, since it is larger than the sum of its proper divisors (2618089).

18132247 is a wasteful number, since it uses less digits than its factorization.

18132247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477.

The product of its digits is 2688, while the sum is 28.

The square root of 18132247 is about 4258.1976234083. The cubic root of 18132247 is about 262.7143983862.

The spelling of 18132247 in words is "eighteen million, one hundred thirty-two thousand, two hundred forty-seven".