20321043 has 4 divisors (see below), whose sum is σ = 27094728. Its totient is φ = 13547360.

The previous prime is 20321039. The next prime is 20321053. The reversal of 20321043 is 34012302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20321043 - 2² = 20321039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3386838 + ... + 3386843.

It is an arithmetic number, because the mean of its divisors is an integer number (6773682).

Almost surely, 2^20321043 is an apocalyptic number.

20321043 is a deficient number, since it is larger than the sum of its proper divisors (6773685).

20321043 is an equidigital number, since it uses as much as digits as its factorization.

20321043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773684.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20321043 is about 4507.8867554543. The cubic root of 20321043 is about 272.8864667656.

Adding to 20321043 its reverse (34012302), we get a palindrome (54333345).

The spelling of 20321043 in words is "twenty million, three hundred twenty-one thousand, forty-three".