18007206 has 48 divisors (see below), whose sum is σ = 43732224. Its totient is φ = 4919376.

The previous prime is 18007201. The next prime is 18007207. The reversal of 18007206 is 60270081.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18007201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5431 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (911088).

Almost surely, 2^18007206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18007206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21866112).

18007206 is an abundant number, since it is smaller than the sum of its proper divisors (25725018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18007206 is a wasteful number, since it uses less digits than its factorization.

18007206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2698 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 18007206 is about 4243.4898373862. The cubic root of 18007206 is about 262.1091070930.

Adding to 18007206 its reverse (60270081), we get a palindrome (78277287).

The spelling of 18007206 in words is "eighteen million, seven thousand, two hundred six".