1820000185 has 4 divisors (see below), whose sum is σ = 2184000228. Its totient is φ = 1456000144.

The previous prime is 1820000159. The next prime is 1820000213. The reversal of 1820000185 is 5810000281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5810000281 = 37189 ⋅156229.

It can be written as a sum of positive squares in 2 ways, for example, as 1258262784 + 561737401 = 35472^2 + 23701^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820000185 - 2¹³ = 1819991993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182000014 + ... + 182000023.

It is an arithmetic number, because the mean of its divisors is an integer number (546000057).

Almost surely, 2^1820000185 is an apocalyptic number.

It is an amenable number.

1820000185 is a deficient number, since it is larger than the sum of its proper divisors (364000043).

1820000185 is an equidigital number, since it uses as much as digits as its factorization.

1820000185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364000042.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1820000185 is about 42661.4601836365. The cubic root of 1820000185 is about 1220.9291911153.

The spelling of 1820000185 in words is "one billion, eight hundred twenty million, one hundred eighty-five", and thus it is an aban number.