17918239919389 has 8 divisors (see below), whose sum is σ = 18193277194560. Its totient is φ = 17645146370976.

The previous prime is 17918239919339. The next prime is 17918239919399. The reversal of 17918239919389 is 98391993281971.

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 17918239919389 - 2¹³ = 17918239911197 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 (17918239919339) 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, 485913112 + ... + 485949985.

It is an arithmetic number, because the mean of its divisors is an integer number (2274159649320).

Almost surely, 2^{17918239919389} is an apocalyptic number.

It is an amenable number.

17918239919389 is a deficient number, since it is larger than the sum of its proper divisors (275037275171).

17918239919389 is a wasteful number, since it uses less digits than its factorization.

17918239919389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971863379.

The product of its digits is 476171136, while the sum is 79.

The spelling of 17918239919389 in words is "seventeen trillion, nine hundred eighteen billion, two hundred thirty-nine million, nine hundred nineteen thousand, three hundred eighty-nine".