18418007 has 4 divisors (see below), whose sum is σ = 18484776. Its totient is φ = 18351240.

The previous prime is 18418003. The next prime is 18418019. The reversal of 18418007 is 70081481.

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 18418007 - 2² = 18418003 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 (18418003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32969 + ... + 33522.

It is an arithmetic number, because the mean of its divisors is an integer number (4621194).

Almost surely, 2^18418007 is an apocalyptic number.

18418007 is a deficient number, since it is larger than the sum of its proper divisors (66769).

18418007 is an equidigital number, since it uses as much as digits as its factorization.

18418007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66768.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 18418007 is about 4291.6205563866. The cubic root of 18418007 is about 264.0873171148.

Adding to 18418007 its reverse (70081481), we get a palindrome (88499488).

The spelling of 18418007 in words is "eighteen million, four hundred eighteen thousand, seven".