20746773 has 10 divisors (see below), whose sum is σ = 30992214. Its totient is φ = 13831128.

The previous prime is 20746721. The next prime is 20746777. The reversal of 20746773 is 37764702.

It can be written as a sum of positive squares in only one way, i.e., 15186609 + 5560164 = 3897^2 + 2358^2 .

It is not a de Polignac number, because 20746773 - 2⁶ = 20746709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 127986 + ... + 128147.

Almost surely, 2^20746773 is an apocalyptic number.

It is an amenable number.

20746773 is a deficient number, since it is larger than the sum of its proper divisors (10245441).

20746773 is an equidigital number, since it uses as much as digits as its factorization.

20746773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256145 (or 256136 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 36.

The square root of 20746773 is about 4554.8625665326. The cubic root of 20746773 is about 274.7789871616.

The spelling of 20746773 in words is "twenty million, seven hundred forty-six thousand, seven hundred seventy-three".