18007799 has 8 divisors (see below), whose sum is σ = 18270720. Its totient is φ = 17746776.

The previous prime is 18007783. The next prime is 18007817. The reversal of 18007799 is 99770081.

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 18007799 - 2⁴ = 18007783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18007729) 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, 36734 + ... + 37220.

It is an arithmetic number, because the mean of its divisors is an integer number (2283840).

Almost surely, 2^18007799 is an apocalyptic number.

18007799 is a deficient number, since it is larger than the sum of its proper divisors (262921).

18007799 is a wasteful number, since it uses less digits than its factorization.

18007799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 18007799 is about 4243.5597085466. The cubic root of 18007799 is about 262.1119842559. Note that the first 3 decimals are identical.

The spelling of 18007799 in words is "eighteen million, seven thousand, seven hundred ninety-nine".