18311730650 has 24 divisors (see below), whose sum is σ = 34092323904. Its totient is φ = 7317702000.

The previous prime is 18311730649. The next prime is 18311730691. The reversal of 18311730650 is 5603711381.

It is a self number, because there is not a number n which added to its sum of digits gives 18311730650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121682 + ... + 226781.

It is an arithmetic number, because the mean of its divisors is an integer number (1420513496).

Almost surely, 2^18311730650 is an apocalyptic number.

18311730650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18311730650 is a deficient number, since it is larger than the sum of its proper divisors (15780593254).

18311730650 is a wasteful number, since it uses less digits than its factorization.

18311730650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349526 (or 349521 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 18311730650 in words is "eighteen billion, three hundred eleven million, seven hundred thirty thousand, six hundred fifty".