20806688441 has 16 divisors (see below), whose sum is σ = 25945801728. Its totient is φ = 16209882000.

The previous prime is 20806688429. The next prime is 20806688443. The reversal of 20806688441 is 14488660802.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20806688441 - 2¹⁰ = 20806687417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20806688443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427436 + ... + 473618.

It is an arithmetic number, because the mean of its divisors is an integer number (1621612608).

Almost surely, 2^20806688441 is an apocalyptic number.

It is an amenable number.

20806688441 is a deficient number, since it is larger than the sum of its proper divisors (5139113287).

20806688441 is a wasteful number, since it uses less digits than its factorization.

20806688441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52052.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 20806688441 in words is "twenty billion, eight hundred six million, six hundred eighty-eight thousand, four hundred forty-one".