20424003 has 4 divisors (see below), whose sum is σ = 27232008. Its totient is φ = 13616000.

The previous prime is 20423989. The next prime is 20424043. The reversal of 20424003 is 30042402.

It is a happy number.

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 20424003 - 2⁶ = 20423939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20424043) 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, 3403998 + ... + 3404003.

It is an arithmetic number, because the mean of its divisors is an integer number (6808002).

Almost surely, 2^20424003 is an apocalyptic number.

20424003 is a deficient number, since it is larger than the sum of its proper divisors (6808005).

20424003 is an equidigital number, since it uses as much as digits as its factorization.

20424003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808004.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20424003 is about 4519.2923118559. The cubic root of 20424003 is about 273.3465657220.

Adding to 20424003 its reverse (30042402), we get a palindrome (50466405).

The spelling of 20424003 in words is "twenty million, four hundred twenty-four thousand, three".