20630773 has 2 divisors, whose sum is σ = 20630774. Its totient is φ = 20630772.

The previous prime is 20630767. The next prime is 20630783. The reversal of 20630773 is 37703602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12439729 + 8191044 = 3527^2 + 2862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20630773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20630783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315386 + 10315387.

It is an arithmetic number, because the mean of its divisors is an integer number (10315387).

Almost surely, 2^20630773 is an apocalyptic number.

It is an amenable number.

20630773 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630773 is an equidigital number, since it uses as much as digits as its factorization.

20630773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 20630773 is about 4542.1110730584. Note that the first 3 decimals coincide. The cubic root of 20630773 is about 274.2659121343.

The spelling of 20630773 in words is "twenty million, six hundred thirty thousand, seven hundred seventy-three".