1868685185 has 16 divisors (see below), whose sum is σ = 2356597056. Its totient is φ = 1420711488.

The previous prime is 1868685103. The next prime is 1868685187. The reversal of 1868685185 is 5815868681.

It is a cyclic number.

It is not a de Polignac number, because 1868685185 - 2¹⁴ = 1868668801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1868685185.

It is not an unprimeable number, because it can be changed into a prime (1868685187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109499 + ... + 125408.

It is an arithmetic number, because the mean of its divisors is an integer number (147287316).

Almost surely, 2^1868685185 is an apocalyptic number.

It is an amenable number.

1868685185 is a deficient number, since it is larger than the sum of its proper divisors (487911871).

1868685185 is a wasteful number, since it uses less digits than its factorization.

1868685185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234992.

The product of its digits is 3686400, while the sum is 56.

The square root of 1868685185 is about 43228.2914883297. The cubic root of 1868685185 is about 1231.7201536703.

The spelling of 1868685185 in words is "one billion, eight hundred sixty-eight million, six hundred eighty-five thousand, one hundred eighty-five".