20730773 has 12 divisors (see below), whose sum is σ = 24678720. Its totient is φ = 17354232.

The previous prime is 20730757. The next prime is 20730781. The reversal of 20730773 is 37703702.

It is not a de Polignac number, because 20730773 - 2⁴ = 20730757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2813 + ... + 7026.

It is an arithmetic number, because the mean of its divisors is an integer number (2056560).

Almost surely, 2^20730773 is an apocalyptic number.

It is an amenable number.

20730773 is a deficient number, since it is larger than the sum of its proper divisors (3947947).

20730773 is an equidigital number, since it uses as much as digits as its factorization.

20730773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896 (or 9889 counting only the distinct ones).

The product of its (nonzero) digits is 6174, while the sum is 29.

The square root of 20730773 is about 4553.1058630346. The cubic root of 20730773 is about 274.7083320856.

The spelling of 20730773 in words is "twenty million, seven hundred thirty thousand, seven hundred seventy-three".