206857488842220 has 48 divisors (see below), whose sum is σ = 579205895532768. Its totient is φ = 55161527808000.

The previous prime is 206857488842209. The next prime is 206857488842287. The reversal of 206857488842220 is 22248884758602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7521781 + ... + 21686220.

It is an arithmetic number, because the mean of its divisors is an integer number (12066789490266).

Almost surely, 2^{206857488842220} is an apocalyptic number.

206857488842220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206857488842220 is an abundant number, since it is smaller than the sum of its proper divisors (372348406690548).

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

206857488842220 is a wasteful number, since it uses less digits than its factorization.

206857488842220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29326050 (or 29326048 counting only the distinct ones).

The product of its (nonzero) digits is 220200960, while the sum is 66.

The spelling of 206857488842220 in words is "two hundred six trillion, eight hundred fifty-seven billion, four hundred eighty-eight million, eight hundred forty-two thousand, two hundred twenty".