20001763 has 2 divisors, whose sum is σ = 20001764. Its totient is φ = 20001762.

The previous prime is 20001703. The next prime is 20001769. The reversal of 20001763 is 36710002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001763.

It is not a weakly prime, because it can be changed into another prime (20001769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000881 + 10000882.

It is an arithmetic number, because the mean of its divisors is an integer number (10000882).

Almost surely, 2^20001763 is an apocalyptic number.

20001763 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001763 is an equidigital number, since it uses as much as digits as its factorization.

20001763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20001763 is about 4472.3330600482. Note that the first 3 decimals coincide. The cubic root of 20001763 is about 271.4497372889.

Adding to 20001763 its reverse (36710002), we get a palindrome (56711765).

The spelling of 20001763 in words is "twenty million, one thousand, seven hundred sixty-three".