206806620 has 48 divisors (see below), whose sum is σ = 579962880. Its totient is φ = 55062336.

The previous prime is 206806601. The next prime is 206806637. The reversal of 206806620 is 26608602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42261 + ... + 46899.

It is an arithmetic number, because the mean of its divisors is an integer number (12082560).

Almost surely, 2^206806620 is an apocalyptic number.

206806620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206806620 is an abundant number, since it is smaller than the sum of its proper divisors (373156260).

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

206806620 is a wasteful number, since it uses less digits than its factorization.

206806620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5394 (or 5392 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 206806620 is about 14380.7725800807. The cubic root of 206806620 is about 591.3639039059.

The spelling of 206806620 in words is "two hundred six million, eight hundred six thousand, six hundred twenty".