18107406 has 36 divisors (see below), whose sum is σ = 39990912. Its totient is φ = 5920992.

The previous prime is 18107351. The next prime is 18107443. The reversal of 18107406 is 60470181.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18107406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 142515 + ... + 142641.

Almost surely, 2^18107406 is an apocalyptic number.

18107406 is an abundant number, since it is smaller than the sum of its proper divisors (21883506).

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

18107406 is a wasteful number, since it uses less digits than its factorization.

18107406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 18107406 is about 4255.2797792860. The cubic root of 18107406 is about 262.5943715106.

Adding to 18107406 its reverse (60470181), we get a palindrome (78577587).

It can be divided in two parts, 1810 and 7406, that added together give a square (9216 = 96²).

The spelling of 18107406 in words is "eighteen million, one hundred seven thousand, four hundred six".