206393620 has 12 divisors (see below), whose sum is σ = 433426644. Its totient is φ = 82557440.

The previous prime is 206393611. The next prime is 206393633. The reversal of 206393620 is 26393602.

It can be written as a sum of positive squares in 2 ways, for example, as 75794436 + 130599184 = 8706^2 + 11428^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5159821 + ... + 5159860.

It is an arithmetic number, because the mean of its divisors is an integer number (36118887).

Almost surely, 2^206393620 is an apocalyptic number.

206393620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206393620 is an abundant number, since it is smaller than the sum of its proper divisors (227033024).

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

206393620 is a wasteful number, since it uses less digits than its factorization.

206393620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319690 (or 10319688 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 206393620 is about 14366.4059527775. The cubic root of 206393620 is about 590.9699834828.

Subtracting from 206393620 its product of nonzero digits (11664), we obtain a square (206381956 = 14366²).

The spelling of 206393620 in words is "two hundred six million, three hundred ninety-three thousand, six hundred twenty".