20076766647 has 32 divisors (see below), whose sum is σ = 30707647488. Its totient is φ = 11429600256.

The previous prime is 20076766643. The next prime is 20076766649. The reversal of 20076766647 is 74666767002.

It is not a de Polignac number, because 20076766647 - 2² = 20076766643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20076766647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20076766643) 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 31 ways as a sum of consecutive naturals, for example, 7741383 + ... + 7743975.

It is an arithmetic number, because the mean of its divisors is an integer number (959613984).

Almost surely, 2^20076766647 is an apocalyptic number.

20076766647 is a deficient number, since it is larger than the sum of its proper divisors (10630880841).

20076766647 is a wasteful number, since it uses less digits than its factorization.

20076766647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3839.

The product of its (nonzero) digits is 3556224, while the sum is 51.

The spelling of 20076766647 in words is "twenty billion, seventy-six million, seven hundred sixty-six thousand, six hundred forty-seven".