18000147 has 16 divisors (see below), whose sum is σ = 26323200. Its totient is φ = 10850400.

The previous prime is 18000139. The next prime is 18000149. The reversal of 18000147 is 74100081.

It is not a de Polignac number, because 18000147 - 2³ = 18000139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18000149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5197 + ... + 7937.

It is an arithmetic number, because the mean of its divisors is an integer number (1645200).

Almost surely, 2^18000147 is an apocalyptic number.

18000147 is a deficient number, since it is larger than the sum of its proper divisors (8323053).

18000147 is a wasteful number, since it uses less digits than its factorization.

18000147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 18000147 is about 4242.6580112001. The cubic root of 18000147 is about 262.0748528430.

The spelling of 18000147 in words is "eighteen million, one hundred forty-seven", and thus it is an aban number.