18830605 has 4 divisors (see below), whose sum is σ = 22596732. Its totient is φ = 15064480.

The previous prime is 18830579. The next prime is 18830633. The reversal of 18830605 is 50603881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50603881 = 41 ⋅1234241.

It can be written as a sum of positive squares in 2 ways, for example, as 14424804 + 4405801 = 3798^2 + 2099^2 .

It is not a de Polignac number, because 18830605 - 2⁵ = 18830573 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1883056 + ... + 1883065.

It is an arithmetic number, because the mean of its divisors is an integer number (5649183).

Almost surely, 2^18830605 is an apocalyptic number.

It is an amenable number.

18830605 is a deficient number, since it is larger than the sum of its proper divisors (3766127).

18830605 is an equidigital number, since it uses as much as digits as its factorization.

18830605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766126.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18830605 is about 4339.4245010139. The cubic root of 18830605 is about 266.0447896010.

The spelling of 18830605 in words is "eighteen million, eight hundred thirty thousand, six hundred five".