201868686 has 20 divisors (see below), whose sum is σ = 452335752. Its totient is φ = 67289508.

The previous prime is 201868669. The next prime is 201868747. The reversal of 201868686 is 686868102.

201868686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 622890 + ... + 623213.

Almost surely, 2^201868686 is an apocalyptic number.

201868686 is an abundant number, since it is smaller than the sum of its proper divisors (250467066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201868686 is a wasteful number, since it uses less digits than its factorization.

201868686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246117 (or 1246108 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 201868686 is about 14208.0500421416. The cubic root of 201868686 is about 586.6192613354.

The spelling of 201868686 in words is "two hundred one million, eight hundred sixty-eight thousand, six hundred eighty-six".