20940763 has 2 divisors, whose sum is σ = 20940764. Its totient is φ = 20940762.

The previous prime is 20940757. The next prime is 20940781. The reversal of 20940763 is 36704902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20940763 - 2⁹ = 20940251 is a prime.

It is not a weakly prime, because it can be changed into another prime (20943763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10470381 + 10470382.

It is an arithmetic number, because the mean of its divisors is an integer number (10470382).

Almost surely, 2^20940763 is an apocalyptic number.

20940763 is a deficient number, since it is larger than the sum of its proper divisors (1).

20940763 is an equidigital number, since it uses as much as digits as its factorization.

20940763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 20940763 is about 4576.1078440089. The cubic root of 20940763 is about 275.6327600169.

The spelling of 20940763 in words is "twenty million, nine hundred forty thousand, seven hundred sixty-three".