20385433 has 4 divisors (see below), whose sum is σ = 20460928. Its totient is φ = 20309940.

The previous prime is 20385419. The next prime is 20385437. The reversal of 20385433 is 33458302.

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 20385433 - 2⁵ = 20385401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20385437) 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 3 ways as a sum of consecutive naturals, for example, 37341 + ... + 37882.

It is an arithmetic number, because the mean of its divisors is an integer number (5115232).

Almost surely, 2^20385433 is an apocalyptic number.

It is an amenable number.

20385433 is a deficient number, since it is larger than the sum of its proper divisors (75495).

20385433 is an equidigital number, since it uses as much as digits as its factorization.

20385433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75494.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 20385433 is about 4515.0230342713. The cubic root of 20385433 is about 273.1743888853.

The spelling of 20385433 in words is "twenty million, three hundred eighty-five thousand, four hundred thirty-three".