18418047 has 8 divisors (see below), whose sum is σ = 24681600. Its totient is φ = 12216600.

The previous prime is 18418033. The next prime is 18418051. The reversal of 18418047 is 74081481.

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

It is not a de Polignac number, because 18418047 - 2²² = 14223743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18417999 and 18418017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18418027) 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, 14829 + ... + 16022.

It is an arithmetic number, because the mean of its divisors is an integer number (3085200).

Almost surely, 2^18418047 is an apocalyptic number.

18418047 is a deficient number, since it is larger than the sum of its proper divisors (6263553).

18418047 is a wasteful number, since it uses less digits than its factorization.

18418047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31053.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 18418047 is about 4291.6252166283. The cubic root of 18418047 is about 264.0875082952.

The spelling of 18418047 in words is "eighteen million, four hundred eighteen thousand, forty-seven".