206266220 has 24 divisors (see below), whose sum is σ = 433448064. Its totient is φ = 82451456.

The previous prime is 206266211. The next prime is 206266243. The reversal of 206266220 is 22662602.

It is a self number, because there is not a number n which added to its sum of digits gives 206266220.

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, 41804 + ... + 46476.

It is an arithmetic number, because the mean of its divisors is an integer number (18060336).

Almost surely, 2^206266220 is an apocalyptic number.

206266220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206266220 is an abundant number, since it is smaller than the sum of its proper divisors (227181844).

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

206266220 is a wasteful number, since it uses less digits than its factorization.

206266220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889 (or 6887 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 206266220 is about 14361.9713131589. The cubic root of 206266220 is about 590.8483630043.

The spelling of 206266220 in words is "two hundred six million, two hundred sixty-six thousand, two hundred twenty".