206112220 has 24 divisors (see below), whose sum is σ = 433165824. Its totient is φ = 82382016.

The previous prime is 206112217. The next prime is 206112239. The reversal of 206112220 is 22211602.

It is a junction number, because it is equal to n+sod(n) for n = 206112194 and 206112203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30162 + ... + 36358.

It is an arithmetic number, because the mean of its divisors is an integer number (18048576).

Almost surely, 2^206112220 is an apocalyptic number.

206112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206112220 is an abundant number, since it is smaller than the sum of its proper divisors (227053604).

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

206112220 is a wasteful number, since it uses less digits than its factorization.

206112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7869 (or 7867 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 206112220 is about 14356.6089310812. The cubic root of 206112220 is about 590.7012823657.

Adding to 206112220 its reverse (22211602), we get a palindrome (228323822).

The spelling of 206112220 in words is "two hundred six million, one hundred twelve thousand, two hundred twenty".