20907763 has 2 divisors, whose sum is σ = 20907764. Its totient is φ = 20907762.

The previous prime is 20907751. The next prime is 20907767. The reversal of 20907763 is 36770902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20907763 is a prime.

It is not a weakly prime, because it can be changed into another prime (20907767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10453881 + 10453882.

It is an arithmetic number, because the mean of its divisors is an integer number (10453882).

Almost surely, 2^20907763 is an apocalyptic number.

20907763 is a deficient number, since it is larger than the sum of its proper divisors (1).

20907763 is an equidigital number, since it uses as much as digits as its factorization.

20907763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 20907763 is about 4572.5007381082. The cubic root of 20907763 is about 275.4878964119.

The spelling of 20907763 in words is "twenty million, nine hundred seven thousand, seven hundred sixty-three".