206286388220 has 96 divisors (see below), whose sum is σ = 491391000576. Its totient is φ = 72063244800.

The previous prime is 206286388207. The next prime is 206286388237. The reversal of 206286388220 is 22883682602.

206286388220 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 823949 + ... + 1044731.

It is an arithmetic number, because the mean of its divisors is an integer number (5118656256).

Almost surely, 2^206286388220 is an apocalyptic number.

206286388220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206286388220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245695500288).

206286388220 is an abundant number, since it is smaller than the sum of its proper divisors (285104612356).

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

206286388220 is a wasteful number, since it uses less digits than its factorization.

206286388220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220971 (or 220969 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 47.

The spelling of 206286388220 in words is "two hundred six billion, two hundred eighty-six million, three hundred eighty-eight thousand, two hundred twenty".