20566551411206 has 16 divisors (see below), whose sum is σ = 32930875503360. Its totient is φ = 9604838685960.

The previous prime is 20566551411199. The next prime is 20566551411251. The reversal of 20566551411206 is 60211415566502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3811441226 + ... + 3811446621.

It is an arithmetic number, because the mean of its divisors is an integer number (2058179718960).

Almost surely, 2^{20566551411206} is an apocalyptic number.

20566551411206 is a deficient number, since it is larger than the sum of its proper divisors (12364324092154).

20566551411206 is a wasteful number, since it uses less digits than its factorization.

20566551411206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7622887939.

The product of its (nonzero) digits is 432000, while the sum is 44.

Adding to 20566551411206 its reverse (60211415566502), we get a palindrome (80777966977708).

The spelling of 20566551411206 in words is "twenty trillion, five hundred sixty-six billion, five hundred fifty-one million, four hundred eleven thousand, two hundred six".