18867340209 has 8 divisors (see below), whose sum is σ = 25180857792. Its totient is φ = 12566024720.

The previous prime is 18867340207. The next prime is 18867340213. The reversal of 18867340209 is 90204376881.

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 18867340209 - 2¹ = 18867340207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18867340207) 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, 3046914 + ... + 3053099.

It is an arithmetic number, because the mean of its divisors is an integer number (3147607224).

Almost surely, 2^18867340209 is an apocalyptic number.

It is an amenable number.

18867340209 is a deficient number, since it is larger than the sum of its proper divisors (6313517583).

18867340209 is a wasteful number, since it uses less digits than its factorization.

18867340209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6101047.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 18867340209 in words is "eighteen billion, eight hundred sixty-seven million, three hundred forty thousand, two hundred nine".