20773747 has 2 divisors, whose sum is σ = 20773748. Its totient is φ = 20773746.

The previous prime is 20773741. The next prime is 20773789. The reversal of 20773747 is 74737702.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20773747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20773741) 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, 10386873 + 10386874.

It is an arithmetic number, because the mean of its divisors is an integer number (10386874).

Almost surely, 2^20773747 is an apocalyptic number.

20773747 is a deficient number, since it is larger than the sum of its proper divisors (1).

20773747 is an equidigital number, since it uses as much as digits as its factorization.

20773747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 37.

The square root of 20773747 is about 4557.8226161184. The cubic root of 20773747 is about 274.8980205894.

The spelling of 20773747 in words is "twenty million, seven hundred seventy-three thousand, seven hundred forty-seven".