18730007 has 4 divisors (see below), whose sum is σ = 18739200. Its totient is φ = 18720816.

The previous prime is 18730001. The next prime is 18730009. The reversal of 18730007 is 70003781.

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: 70003781 = 2381 ⋅29401.

It is a cyclic number.

It is not a de Polignac number, because 18730007 - 2²⁰ = 17681431 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 (18730001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 6120.

It is an arithmetic number, because the mean of its divisors is an integer number (4684800).

Almost surely, 2^18730007 is an apocalyptic number.

18730007 is a deficient number, since it is larger than the sum of its proper divisors (9193).

18730007 is an equidigital number, since it uses as much as digits as its factorization.

18730007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9192.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 18730007 is about 4327.8178103982. The cubic root of 18730007 is about 265.5701832350.

Adding to 18730007 its reverse (70003781), we get a palindrome (88733788).

The spelling of 18730007 in words is "eighteen million, seven hundred thirty thousand, seven".