1868900185 has 16 divisors (see below), whose sum is σ = 2429830656. Its totient is φ = 1374444288.

The previous prime is 1868900183. The next prime is 1868900203. The reversal of 1868900185 is 5810098681.

It is not a de Polignac number, because 1868900185 - 2¹ = 1868900183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868900183) 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, 252009 + ... + 259318.

It is an arithmetic number, because the mean of its divisors is an integer number (151864416).

Almost surely, 2^1868900185 is an apocalyptic number.

It is an amenable number.

1868900185 is a deficient number, since it is larger than the sum of its proper divisors (560930471).

1868900185 is a wasteful number, since it uses less digits than its factorization.

1868900185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511392.

The product of its (nonzero) digits is 138240, while the sum is 46.

The square root of 1868900185 is about 43230.7782141381. The cubic root of 1868900185 is about 1231.7673900337.

The spelling of 1868900185 in words is "one billion, eight hundred sixty-eight million, nine hundred thousand, one hundred eighty-five".