18130989 has 8 divisors (see below), whose sum is σ = 24253632. Its totient is φ = 12047840.

The previous prime is 18130967. The next prime is 18131011. The reversal of 18130989 is 98903181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18130967) and next prime (18131011).

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

It is a cyclic number.

It is not a de Polignac number, because 18130989 - 2¹⁵ = 18098221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18130909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8784 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (3031704).

Almost surely, 2^18130989 is an apocalyptic number.

It is an amenable number.

18130989 is a deficient number, since it is larger than the sum of its proper divisors (6122643).

18130989 is a wasteful number, since it uses less digits than its factorization.

18130989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19747.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 18130989 is about 4258.0499057667. The cubic root of 18130989 is about 262.7083226112.

The spelling of 18130989 in words is "eighteen million, one hundred thirty thousand, nine hundred eighty-nine".