18001306 has 8 divisors (see below), whose sum is σ = 27174420. Its totient is φ = 8943168.

The previous prime is 18001273. The next prime is 18001307. The reversal of 18001306 is 60310081.

It can be written as a sum of positive squares in 2 ways, for example, as 15249025 + 2752281 = 3905^2 + 1659^2 .

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 (18001307) 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, 28351 + ... + 28978.

Almost surely, 2^18001306 is an apocalyptic number.

18001306 is a deficient number, since it is larger than the sum of its proper divisors (9173114).

18001306 is a wasteful number, since it uses less digits than its factorization.

18001306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57488.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 18001306 is about 4242.7945979036. The cubic root of 18001306 is about 262.0804775792.

Adding to 18001306 its reverse (60310081), we get a palindrome (78311387).

The spelling of 18001306 in words is "eighteen million, one thousand, three hundred six".