18073147 has 8 divisors (see below), whose sum is σ = 18905760. Its totient is φ = 17244480.

The previous prime is 18073129. The next prime is 18073151. The reversal of 18073147 is 74137081.

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

It is a de Polignac number, because none of the positive numbers 2^k-18073147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18073127) 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, 12397 + ... + 13777.

It is an arithmetic number, because the mean of its divisors is an integer number (2363220).

Almost surely, 2^18073147 is an apocalyptic number.

18073147 is a deficient number, since it is larger than the sum of its proper divisors (832613).

18073147 is a wasteful number, since it uses less digits than its factorization.

18073147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 18073147 is about 4251.2524037041. The cubic root of 18073147 is about 262.4286584661.

The spelling of 18073147 in words is "eighteen million, seventy-three thousand, one hundred forty-seven".