18163147 has 4 divisors (see below), whose sum is σ = 18209296. Its totient is φ = 18117000.

The previous prime is 18163141. The next prime is 18163151. The reversal of 18163147 is 74136181.

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 18163147 - 2¹⁵ = 18130379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18163141) 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, 22479 + ... + 23272.

It is an arithmetic number, because the mean of its divisors is an integer number (4552324).

Almost surely, 2^18163147 is an apocalyptic number.

18163147 is a deficient number, since it is larger than the sum of its proper divisors (46149).

18163147 is an equidigital number, since it uses as much as digits as its factorization.

18163147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46148.

The product of its digits is 4032, while the sum is 31.

The square root of 18163147 is about 4261.8243746077. The cubic root of 18163147 is about 262.8635482759.

The spelling of 18163147 in words is "eighteen million, one hundred sixty-three thousand, one hundred forty-seven".