18323749206 has 80 divisors (see below), whose sum is σ = 47186979840. Its totient is φ = 5206051440.

The previous prime is 18323749189. The next prime is 18323749231. The reversal of 18323749206 is 60294732381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 157851 + ... + 248121.

It is an arithmetic number, because the mean of its divisors is an integer number (589837248).

Almost surely, 2^18323749206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18323749206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23593489920).

18323749206 is an abundant number, since it is smaller than the sum of its proper divisors (28863230634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18323749206 is a wasteful number, since it uses less digits than its factorization.

18323749206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90471 (or 90462 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 18323749206 in words is "eighteen billion, three hundred twenty-three million, seven hundred forty-nine thousand, two hundred six".