20730573 has 16 divisors (see below), whose sum is σ = 31094400. Its totient is φ = 13818924.

The previous prime is 20730571. The next prime is 20730587. The reversal of 20730573 is 37503702.

20730573 is a `hidden beast` number, since 20 + 73 + 0 + 573 = 666.

It is not a de Polignac number, because 20730573 - 2¹ = 20730571 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20730571) 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 15 ways as a sum of consecutive naturals, for example, 2553 + ... + 6926.

It is an arithmetic number, because the mean of its divisors is an integer number (1943400).

Almost surely, 2^20730573 is an apocalyptic number.

It is an amenable number.

20730573 is a deficient number, since it is larger than the sum of its proper divisors (10363827).

20730573 is an frugal number, since it uses more digits than its factorization.

20730573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9500 (or 9482 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 27.

The square root of 20730573 is about 4553.0838999518. The cubic root of 20730573 is about 274.7074486671.

The spelling of 20730573 in words is "twenty million, seven hundred thirty thousand, five hundred seventy-three".