18349569850 has 12 divisors (see below), whose sum is σ = 34130200014. Its totient is φ = 7339827920.

The previous prime is 18349569811. The next prime is 18349569851. The reversal of 18349569850 is 5896594381.

It can be written as a sum of positive squares in 3 ways, for example, as 9938295481 + 8411274369 = 99691^2 + 91713^2 .

It is not an unprimeable number, because it can be changed into a prime (18349569851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183495649 + ... + 183495748.

Almost surely, 2^18349569850 is an apocalyptic number.

18349569850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18349569850 is a deficient number, since it is larger than the sum of its proper divisors (15780630164).

18349569850 is a wasteful number, since it uses less digits than its factorization.

18349569850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366991409 (or 366991404 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 18349569850 in words is "eighteen billion, three hundred forty-nine million, five hundred sixty-nine thousand, eight hundred fifty".