18004907 has 4 divisors (see below), whose sum is σ = 18048096. Its totient is φ = 17961720.

The previous prime is 18004897. The next prime is 18004919. The reversal of 18004907 is 70940081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70940081 = 4657 ⋅15233.

It is a cyclic number.

It is not a de Polignac number, because 18004907 - 2¹⁰ = 18003883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18004907.

It is not an unprimeable number, because it can be changed into a prime (18004937) 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, 20963 + ... + 21804.

It is an arithmetic number, because the mean of its divisors is an integer number (4512024).

Almost surely, 2^18004907 is an apocalyptic number.

18004907 is a deficient number, since it is larger than the sum of its proper divisors (43189).

18004907 is an equidigital number, since it uses as much as digits as its factorization.

18004907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43188.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18004907 is about 4243.2189432081. The cubic root of 18004907 is about 262.0979520313.

Adding to 18004907 its reverse (70940081), we get a palindrome (88944988).

The spelling of 18004907 in words is "eighteen million, four thousand, nine hundred seven".