206421168 has 80 divisors (see below), whose sum is σ = 566570880. Its totient is φ = 64576512.

The previous prime is 206421161. The next prime is 206421169. The reversal of 206421168 is 861124602.

206421168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (206421161) 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, 102055 + ... + 104057.

It is an arithmetic number, because the mean of its divisors is an integer number (7082136).

Almost surely, 2^206421168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206421168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283285440).

206421168 is an abundant number, since it is smaller than the sum of its proper divisors (360149712).

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

206421168 is a wasteful number, since it uses less digits than its factorization.

206421168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 206421168 is about 14367.3646852859. The cubic root of 206421168 is about 590.9962751819.

It can be divided in two parts, 2064 and 21168, that added together give a palindrome (23232).

The spelling of 206421168 in words is "two hundred six million, four hundred twenty-one thousand, one hundred sixty-eight".