18805130 has 8 divisors (see below), whose sum is σ = 33849252. Its totient is φ = 7522048.

The previous prime is 18805109. The next prime is 18805133. The reversal of 18805130 is 3150881.

It can be written as a sum of positive squares in 2 ways, for example, as 18344089 + 461041 = 4283^2 + 679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18805130.

It is not an unprimeable number, because it can be changed into a prime (18805133) 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, 940247 + ... + 940266.

Almost surely, 2^18805130 is an apocalyptic number.

18805130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18805130 is a deficient number, since it is larger than the sum of its proper divisors (15044122).

18805130 is a wasteful number, since it uses less digits than its factorization.

18805130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880520.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 18805130 is about 4336.4882105224. The cubic root of 18805130 is about 265.9247624852.

The spelling of 18805130 in words is "eighteen million, eight hundred five thousand, one hundred thirty".