20128763 has 2 divisors, whose sum is σ = 20128764. Its totient is φ = 20128762.

The previous prime is 20128751. The next prime is 20128781. The reversal of 20128763 is 36782102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20128763 - 2⁴ = 20128747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20128783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064381 + 10064382.

It is an arithmetic number, because the mean of its divisors is an integer number (10064382).

Almost surely, 2^20128763 is an apocalyptic number.

20128763 is a deficient number, since it is larger than the sum of its proper divisors (1).

20128763 is an equidigital number, since it uses as much as digits as its factorization.

20128763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20128763 is about 4486.5089992109. The cubic root of 20128763 is about 272.0230435711.

The spelling of 20128763 in words is "twenty million, one hundred twenty-eight thousand, seven hundred sixty-three".