18284207 has 4 divisors (see below), whose sum is σ = 18295056. Its totient is φ = 18273360.

The previous prime is 18284171. The next prime is 18284219. The reversal of 18284207 is 70248281.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70248281 = 4967 ⋅14143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18284207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18284257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (4573764).

Almost surely, 2^18284207 is an apocalyptic number.

18284207 is a deficient number, since it is larger than the sum of its proper divisors (10849).

18284207 is an equidigital number, since it uses as much as digits as its factorization.

18284207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10848.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18284207 is about 4276.0036248815. The cubic root of 18284207 is about 263.4462634078.

The spelling of 18284207 in words is "eighteen million, two hundred eighty-four thousand, two hundred seven".