206424220 has 12 divisors (see below), whose sum is σ = 433490904. Its totient is φ = 82569680.

The previous prime is 206424173. The next prime is 206424259. The reversal of 206424220 is 22424602.

It is a super-2 number, since 2×206424220² = 85221917205216800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206424191 and 206424200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5160586 + ... + 5160625.

It is an arithmetic number, because the mean of its divisors is an integer number (36124242).

Almost surely, 2^206424220 is an apocalyptic number.

206424220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206424220 is an abundant number, since it is smaller than the sum of its proper divisors (227066684).

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

206424220 is a wasteful number, since it uses less digits than its factorization.

206424220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321220 (or 10321218 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 206424220 is about 14367.4708978303. The cubic root of 206424220 is about 590.9991878543. Note that the first 3 decimals are identical.

Adding to 206424220 its reverse (22424602), we get a palindrome (228848822).

The spelling of 206424220 in words is "two hundred six million, four hundred twenty-four thousand, two hundred twenty".