30518109 has 6 divisors (see below), whose sum is σ = 44081726. Its totient is φ = 20345400.

The previous prime is 30518101. The next prime is 30518129. The reversal of 30518109 is 90181503.

It can be written as a sum of positive squares in only one way, i.e., 27594009 + 2924100 = 5253^2 + 1710^2 .

It is not a de Polignac number, because 30518109 - 2³ = 30518101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30518101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1695442 + ... + 1695459.

Almost surely, 2^30518109 is an apocalyptic number.

It is an amenable number.

30518109 is a deficient number, since it is larger than the sum of its proper divisors (13563617).

30518109 is a wasteful number, since it uses less digits than its factorization.

30518109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390907 (or 3390904 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 30518109 is about 5524.3197771309. The cubic root of 30518109 is about 312.5018120428.

The spelling of 30518109 in words is "thirty million, five hundred eighteen thousand, one hundred nine".