20385073 has 4 divisors (see below), whose sum is σ = 21042688. Its totient is φ = 19727460.

The previous prime is 20385067. The next prime is 20385083. The reversal of 20385073 is 37058302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20385073 - 2⁹ = 20384561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20385083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328761 + ... + 328822.

It is an arithmetic number, because the mean of its divisors is an integer number (5260672).

Almost surely, 2^20385073 is an apocalyptic number.

It is an amenable number.

20385073 is a deficient number, since it is larger than the sum of its proper divisors (657615).

20385073 is an equidigital number, since it uses as much as digits as its factorization.

20385073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657614.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20385073 is about 4514.9831671890. The cubic root of 20385073 is about 273.1727808194.

The spelling of 20385073 in words is "twenty million, three hundred eighty-five thousand, seventy-three".