20423303 has 4 divisors (see below), whose sum is σ = 20437248. Its totient is φ = 20409360.

The previous prime is 20423257. The next prime is 20423329. The reversal of 20423303 is 30332402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30332402 = 2 ⋅15166201.

It is a cyclic number.

It is not a de Polignac number, because 20423303 - 2¹⁶ = 20357767 is a prime.

It is a super-2 number, since 2×20423303² = 834222610859618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423353) 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, 4478 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (5109312).

Almost surely, 2^20423303 is an apocalyptic number.

20423303 is a deficient number, since it is larger than the sum of its proper divisors (13945).

20423303 is a wasteful number, since it uses less digits than its factorization.

20423303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13944.

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 20423303 is about 4519.2148654385. The cubic root of 20423303 is about 273.3434428477.

Adding to 20423303 its reverse (30332402), we get a palindrome (50755705).

Subtracting 20423303 from its reverse (30332402), we obtain a palindrome (9909099).

The spelling of 20423303 in words is "twenty million, four hundred twenty-three thousand, three hundred three".