20076766643 has 2 divisors, whose sum is σ = 20076766644. Its totient is φ = 20076766642.

The previous prime is 20076766639. The next prime is 20076766649. The reversal of 20076766643 is 34666767002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20076766643 - 2² = 20076766639 is a prime.

It is not a weakly prime, because it can be changed into another prime (20076766649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10038383321 + 10038383322.

It is an arithmetic number, because the mean of its divisors is an integer number (10038383322).

Almost surely, 2^20076766643 is an apocalyptic number.

20076766643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20076766643 is an equidigital number, since it uses as much as digits as its factorization.

20076766643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 47.

The spelling of 20076766643 in words is "twenty billion, seventy-six million, seven hundred sixty-six thousand, six hundred forty-three".