18475799 has 4 divisors (see below), whose sum is σ = 18495120. Its totient is φ = 18456480.

The previous prime is 18475781. The next prime is 18475801. The reversal of 18475799 is 99757481.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18475799 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 (18475199) 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, 8147 + ... + 10164.

It is an arithmetic number, because the mean of its divisors is an integer number (4623780).

Almost surely, 2^18475799 is an apocalyptic number.

18475799 is a deficient number, since it is larger than the sum of its proper divisors (19321).

18475799 is a wasteful number, since it uses less digits than its factorization.

18475799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19320.

The product of its digits is 635040, while the sum is 50.

The square root of 18475799 is about 4298.3484037477. The cubic root of 18475799 is about 264.3632463333.

The spelling of 18475799 in words is "eighteen million, four hundred seventy-five thousand, seven hundred ninety-nine".