18382147 has 4 divisors (see below), whose sum is σ = 21008176. Its totient is φ = 15756120.

The previous prime is 18382141. The next prime is 18382157. The reversal of 18382147 is 74128381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18382147 - 2⁷ = 18382019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18382141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313004 + ... + 1313017.

It is an arithmetic number, because the mean of its divisors is an integer number (5252044).

Almost surely, 2^18382147 is an apocalyptic number.

18382147 is a deficient number, since it is larger than the sum of its proper divisors (2626029).

18382147 is an equidigital number, since it uses as much as digits as its factorization.

18382147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626028.

The product of its digits is 10752, while the sum is 34.

The square root of 18382147 is about 4287.4406118336. The cubic root of 18382147 is about 263.9158124199.

The spelling of 18382147 in words is "eighteen million, three hundred eighty-two thousand, one hundred forty-seven".