18348799 has 4 divisors (see below), whose sum is σ = 20970064. Its totient is φ = 15727536.

The previous prime is 18348773. The next prime is 18348817. The reversal of 18348799 is 99784381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18348799 - 2⁵ = 18348767 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 (18348719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310622 + ... + 1310635.

It is an arithmetic number, because the mean of its divisors is an integer number (5242516).

Almost surely, 2^18348799 is an apocalyptic number.

18348799 is a deficient number, since it is larger than the sum of its proper divisors (2621265).

18348799 is an equidigital number, since it uses as much as digits as its factorization.

18348799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621264.

The product of its digits is 435456, while the sum is 49.

The square root of 18348799 is about 4283.5498129472. The cubic root of 18348799 is about 263.7561213886.

The spelling of 18348799 in words is "eighteen million, three hundred forty-eight thousand, seven hundred ninety-nine".