18675799 has 4 divisors (see below), whose sum is σ = 18684864. Its totient is φ = 18666736.

The previous prime is 18675791. The next prime is 18675817. The reversal of 18675799 is 99757681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99757681 = 317 ⋅314693.

It is a cyclic number.

It is not a de Polignac number, because 18675799 - 2³ = 18675791 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 (18675791) 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, 219 + ... + 6115.

It is an arithmetic number, because the mean of its divisors is an integer number (4671216).

Almost surely, 2^18675799 is an apocalyptic number.

18675799 is a deficient number, since it is larger than the sum of its proper divisors (9065).

18675799 is an equidigital number, since it uses as much as digits as its factorization.

18675799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9064.

The product of its digits is 952560, while the sum is 52.

The square root of 18675799 is about 4321.5505319272. The cubic root of 18675799 is about 265.3137330889.

The spelling of 18675799 in words is "eighteen million, six hundred seventy-five thousand, seven hundred ninety-nine".