18601242309 has 24 divisors (see below), whose sum is σ = 28941479840. Its totient is φ = 11444460192.

The previous prime is 18601242301. The next prime is 18601242329. The reversal of 18601242309 is 90324210681.

18601242309 is a `hidden beast` number, since 1 + 8 + 601 + 2 + 42 + 3 + 0 + 9 = 666.

It is not a de Polignac number, because 18601242309 - 2³ = 18601242301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18601242301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 636582 + ... + 665160.

Almost surely, 2^18601242309 is an apocalyptic number.

It is an amenable number.

18601242309 is a deficient number, since it is larger than the sum of its proper divisors (10340237531).

18601242309 is a wasteful number, since it uses less digits than its factorization.

18601242309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34161 (or 34158 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 18601242309 in words is "eighteen billion, six hundred one million, two hundred forty-two thousand, three hundred nine".