18609365823 has 8 divisors (see below), whose sum is σ = 24830460336. Its totient is φ = 12397257600.

The previous prime is 18609365773. The next prime is 18609365857. The reversal of 18609365823 is 32856390681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18609365823 - 2⁹ = 18609365311 is a prime.

It is a super-3 number, since 3×18609365823³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18609365123) 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, 2241738 + ... + 2250023.

It is an arithmetic number, because the mean of its divisors is an integer number (3103807542).

Almost surely, 2^18609365823 is an apocalyptic number.

18609365823 is a deficient number, since it is larger than the sum of its proper divisors (6221094513).

18609365823 is a wasteful number, since it uses less digits than its factorization.

18609365823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4493145.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 18609365823 in words is "eighteen billion, six hundred nine million, three hundred sixty-five thousand, eight hundred twenty-three".