20936573 has 12 divisors (see below), whose sum is σ = 24875712. Its totient is φ = 17561880.

The previous prime is 20936567. The next prime is 20936581. The reversal of 20936573 is 37563902.

20936573 = 302² + 303² + ... + 448².

It is not a de Polignac number, because 20936573 - 2⁸ = 20936317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20935573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2243 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (2072976).

Almost surely, 2^20936573 is an apocalyptic number.

It is an amenable number.

20936573 is a deficient number, since it is larger than the sum of its proper divisors (3939139).

20936573 is an equidigital number, since it uses as much as digits as its factorization.

20936573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9152 (or 9145 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 20936573 is about 4575.6500084687. The cubic root of 20936573 is about 275.6143751678.

The spelling of 20936573 in words is "twenty million, nine hundred thirty-six thousand, five hundred seventy-three".