18648607 has 4 divisors (see below), whose sum is σ = 19459440. Its totient is φ = 17837776.

The previous prime is 18648601. The next prime is 18648659. The reversal of 18648607 is 70684681.

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 18648607 - 2³ = 18648599 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 18648607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18648601) 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, 405382 + ... + 405427.

It is an arithmetic number, because the mean of its divisors is an integer number (4864860).

Almost surely, 2^18648607 is an apocalyptic number.

18648607 is a deficient number, since it is larger than the sum of its proper divisors (810833).

18648607 is an equidigital number, since it uses as much as digits as its factorization.

18648607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810832.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 18648607 is about 4318.4032928850. The cubic root of 18648607 is about 265.1849047718.

The spelling of 18648607 in words is "eighteen million, six hundred forty-eight thousand, six hundred seven".