18006147 has 12 divisors (see below), whose sum is σ = 26156520. Its totient is φ = 11935968.

The previous prime is 18006137. The next prime is 18006193. The reversal of 18006147 is 74160081.

It is a happy number.

It is not a de Polignac number, because 18006147 - 2⁷ = 18006019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18006147.

It is not an unprimeable number, because it can be changed into a prime (18006127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3978 + ... + 7199.

It is an arithmetic number, because the mean of its divisors is an integer number (2179710).

Almost surely, 2^18006147 is an apocalyptic number.

18006147 is a deficient number, since it is larger than the sum of its proper divisors (8150373).

18006147 is a wasteful number, since it uses less digits than its factorization.

18006147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11362 (or 11359 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 18006147 is about 4243.3650561789. The cubic root of 18006147 is about 262.1039687984.

The spelling of 18006147 in words is "eighteen million, six thousand, one hundred forty-seven".