18122306 has 8 divisors (see below), whose sum is σ = 28782540. Its totient is φ = 8528128.

The previous prime is 18122243. The next prime is 18122309. The reversal of 18122306 is 60322181.

It can be written as a sum of positive squares in 2 ways, for example, as 14478025 + 3644281 = 3805^2 + 1909^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18122309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266471 + ... + 266538.

Almost surely, 2^18122306 is an apocalyptic number.

18122306 is a deficient number, since it is larger than the sum of its proper divisors (10660234).

18122306 is a wasteful number, since it uses less digits than its factorization.

18122306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533028.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 18122306 is about 4257.0301854697. The cubic root of 18122306 is about 262.6663785745. Note that the first 3 decimals are identical.

Adding to 18122306 its reverse (60322181), we get a palindrome (78444487).

The spelling of 18122306 in words is "eighteen million, one hundred twenty-two thousand, three hundred six".