18661130 has 8 divisors (see below), whose sum is σ = 33590052. Its totient is φ = 7464448.

The previous prime is 18661129. The next prime is 18661133. The reversal of 18661130 is 3116681.

It can be written as a sum of positive squares in 2 ways, for example, as 17247409 + 1413721 = 4153^2 + 1189^2 .

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 18661130.

It is not an unprimeable number, because it can be changed into a prime (18661133) 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, 933047 + ... + 933066.

Almost surely, 2^18661130 is an apocalyptic number.

18661130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18661130 is a deficient number, since it is larger than the sum of its proper divisors (14928922).

18661130 is a wasteful number, since it uses less digits than its factorization.

18661130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866120.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18661130 is about 4319.8530067584. The cubic root of 18661130 is about 265.2442508932.

It can be divided in two parts, 186 and 61130, that added together give a palindrome (61316).

The spelling of 18661130 in words is "eighteen million, six hundred sixty-one thousand, one hundred thirty".