305018109 has 32 divisors (see below), whose sum is σ = 503470080. Its totient is φ = 180918000.

The previous prime is 305018093. The next prime is 305018113. The reversal of 305018109 is 901810503.

It is not a de Polignac number, because 305018109 - 2⁴ = 305018093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305018179) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3034 + ... + 24884.

It is an arithmetic number, because the mean of its divisors is an integer number (15733440).

Almost surely, 2^305018109 is an apocalyptic number.

It is an amenable number.

305018109 is a deficient number, since it is larger than the sum of its proper divisors (198451971).

305018109 is a wasteful number, since it uses less digits than its factorization.

305018109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21918 (or 21912 counting only the distinct ones).

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

The square root of 305018109 is about 17464.7676480393. The cubic root of 305018109 is about 673.1448715823.

The spelling of 305018109 in words is "three hundred five million, eighteen thousand, one hundred nine".