18145299 has 8 divisors (see below), whose sum is σ = 24227280. Its totient is φ = 12080096.

The previous prime is 18145297. The next prime is 18145313. The reversal of 18145299 is 99254181.

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

It is a cyclic number.

It is not a de Polignac number, because 18145299 - 2¹ = 18145297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18145297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404 + ... + 6185.

It is an arithmetic number, because the mean of its divisors is an integer number (3028410).

Almost surely, 2^18145299 is an apocalyptic number.

18145299 is a deficient number, since it is larger than the sum of its proper divisors (6081981).

18145299 is an equidigital number, since it uses as much as digits as its factorization.

18145299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8389.

The product of its digits is 25920, while the sum is 39.

The square root of 18145299 is about 4259.7299210161. The cubic root of 18145299 is about 262.7774191821. Note that the first 3 decimals are identical.

The spelling of 18145299 in words is "eighteen million, one hundred forty-five thousand, two hundred ninety-nine".