206921682 has 32 divisors (see below), whose sum is σ = 501629760. Its totient is φ = 62703360.

The previous prime is 206921657. The next prime is 206921713. The reversal of 206921682 is 286129602.

It is a happy 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, 173583 + ... + 174770.

It is an arithmetic number, because the mean of its divisors is an integer number (15675930).

Almost surely, 2^206921682 is an apocalyptic number.

206921682 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

206921682 is an abundant number, since it is smaller than the sum of its proper divisors (294708078).

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

206921682 is a wasteful number, since it uses less digits than its factorization.

206921682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348375 (or 348369 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 206921682 is about 14384.7725738018. The cubic root of 206921682 is about 591.4735569047.

The spelling of 206921682 in words is "two hundred six million, nine hundred twenty-one thousand, six hundred eighty-two".