20040042403 has 4 divisors (see below), whose sum is σ = 20129908288. Its totient is φ = 19950176520.

The previous prime is 20040042401. The next prime is 20040042409. The reversal of 20040042403 is 30424004002.

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 20040042403 - 2¹ = 20040042401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20040042401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44932608 + ... + 44933053.

It is an arithmetic number, because the mean of its divisors is an integer number (5032477072).

Almost surely, 2^20040042403 is an apocalyptic number.

20040042403 is a deficient number, since it is larger than the sum of its proper divisors (89865885).

20040042403 is an equidigital number, since it uses as much as digits as its factorization.

20040042403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89865884.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20040042403 its reverse (30424004002), we get a palindrome (50464046405).

The spelling of 20040042403 in words is "twenty billion, forty million, forty-two thousand, four hundred three".