20423144003 has 2 divisors, whose sum is σ = 20423144004. Its totient is φ = 20423144002.

The previous prime is 20423143999. The next prime is 20423144017. The reversal of 20423144003 is 30044132402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20423144003 - 2² = 20423143999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20423144003.

It is not a weakly prime, because it can be changed into another prime (20423144033) 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 as a sum of consecutive naturals, namely, 10211572001 + 10211572002.

It is an arithmetic number, because the mean of its divisors is an integer number (10211572002).

Almost surely, 2^20423144003 is an apocalyptic number.

20423144003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423144003 is an equidigital number, since it uses as much as digits as its factorization.

20423144003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20423144003 its reverse (30044132402), we get a palindrome (50467276405).

The spelling of 20423144003 in words is "twenty billion, four hundred twenty-three million, one hundred forty-four thousand, three".