20808400628206 has 16 divisors (see below), whose sum is σ = 31652502887520. Its totient is φ = 10257568997760.

The previous prime is 20808400628203. The next prime is 20808400628291. The reversal of 20808400628206 is 60282600480802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808400628201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16567210 + ... + 17778898.

It is an arithmetic number, because the mean of its divisors is an integer number (1978281430470).

Almost surely, 2^{20808400628206} is an apocalyptic number.

20808400628206 is a deficient number, since it is larger than the sum of its proper divisors (10844102259314).

20808400628206 is a wasteful number, since it uses less digits than its factorization.

20808400628206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332699.

The product of its (nonzero) digits is 589824, while the sum is 46.

The spelling of 20808400628206 in words is "twenty trillion, eight hundred eight billion, four hundred million, six hundred twenty-eight thousand, two hundred six".