20323443 has 16 divisors (see below), whose sum is σ = 31069440. Its totient is φ = 11575776.

The previous prime is 20323441. The next prime is 20323447. The reversal of 20323443 is 34432302.

It is not a de Polignac number, because 20323443 - 2¹ = 20323441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20323441) 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, 5893 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (1941840).

Almost surely, 2^20323443 is an apocalyptic number.

20323443 is a deficient number, since it is larger than the sum of its proper divisors (10745997).

20323443 is a wasteful number, since it uses less digits than its factorization.

20323443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 20323443 is about 4508.1529477159. The cubic root of 20323443 is about 272.8972093530.

Adding to 20323443 its reverse (34432302), we get a palindrome (54755745).

The spelling of 20323443 in words is "twenty million, three hundred twenty-three thousand, four hundred forty-three".