18323749205 has 8 divisors (see below), whose sum is σ = 22582783032. Its totient is φ = 14262810048.

The previous prime is 18323749189. The next prime is 18323749231. The reversal of 18323749205 is 50294732381.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1468958929 + 16854790276 = 38327^2 + 129826^2 .

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 18323749205 - 2⁴ = 18323749189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49523462 + ... + 49523831.

It is an arithmetic number, because the mean of its divisors is an integer number (2822847879).

Almost surely, 2^18323749205 is an apocalyptic number.

It is an amenable number.

18323749205 is a deficient number, since it is larger than the sum of its proper divisors (4259033827).

18323749205 is an equidigital number, since it uses as much as digits as its factorization.

18323749205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99047335.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 18323749205 in words is "eighteen billion, three hundred twenty-three million, seven hundred forty-nine thousand, two hundred five".