18009130 has 8 divisors (see below), whose sum is σ = 32416452. Its totient is φ = 7203648.

The previous prime is 18009119. The next prime is 18009133. The reversal of 18009130 is 3190081.

It can be written as a sum of positive squares in 2 ways, for example, as 16900321 + 1108809 = 4111^2 + 1053^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18009133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900447 + ... + 900466.

Almost surely, 2^18009130 is an apocalyptic number.

18009130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18009130 is a deficient number, since it is larger than the sum of its proper divisors (14407322).

18009130 is a wasteful number, since it uses less digits than its factorization.

18009130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800920.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 18009130 is about 4243.7165315322. The cubic root of 18009130 is about 262.1184418738.

The spelling of 18009130 in words is "eighteen million, nine thousand, one hundred thirty".