20466777047 has 2 divisors, whose sum is σ = 20466777048. Its totient is φ = 20466777046.

The previous prime is 20466777011. The next prime is 20466777049. The reversal of 20466777047 is 74077766402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20466777047 - 2²⁰ = 20465728471 is a prime.

Together with 20466777049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20466776986 and 20466777004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20466777049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233388523 + 10233388524.

It is an arithmetic number, because the mean of its divisors is an integer number (10233388524).

Almost surely, 2^20466777047 is an apocalyptic number.

20466777047 is a deficient number, since it is larger than the sum of its proper divisors (1).

20466777047 is an equidigital number, since it uses as much as digits as its factorization.

20466777047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2765952, while the sum is 50.

The spelling of 20466777047 in words is "twenty billion, four hundred sixty-six million, seven hundred seventy-seven thousand, forty-seven".