18057561850 has 12 divisors (see below), whose sum is σ = 33587065134. Its totient is φ = 7223024720.

The previous prime is 18057561839. The next prime is 18057561887. The reversal of 18057561850 is 5816575081.

It can be written as a sum of positive squares in 3 ways, for example, as 15817338289 + 2240223561 = 125767^2 + 47331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18057561850.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180575569 + ... + 180575668.

Almost surely, 2^18057561850 is an apocalyptic number.

18057561850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18057561850 is a deficient number, since it is larger than the sum of its proper divisors (15529503284).

18057561850 is a wasteful number, since it uses less digits than its factorization.

18057561850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361151249 (or 361151244 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 46.

The spelling of 18057561850 in words is "eighteen billion, fifty-seven million, five hundred sixty-one thousand, eight hundred fifty".