18287130 has 16 divisors (see below), whose sum is σ = 43889184. Its totient is φ = 4876560.

The previous prime is 18287099. The next prime is 18287149. The reversal of 18287130 is 3178281.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 609571 = 18287130 / (1 + 8 + 2 + 8 + 7 + 1 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304756 + ... + 304815.

It is an arithmetic number, because the mean of its divisors is an integer number (2743074).

Almost surely, 2^18287130 is an apocalyptic number.

18287130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18287130 is an abundant number, since it is smaller than the sum of its proper divisors (25602054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18287130 is a wasteful number, since it uses less digits than its factorization.

18287130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609581.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 18287130 is about 4276.3454023266. The cubic root of 18287130 is about 263.4603012493.

The spelling of 18287130 in words is "eighteen million, two hundred eighty-seven thousand, one hundred thirty".