20404302403 has 4 divisors (see below), whose sum is σ = 20457577728. Its totient is φ = 20351027080.

The previous prime is 20404302397. The next prime is 20404302419. The reversal of 20404302403 is 30420340402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20404302403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404302203) 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, 26637088 + ... + 26637853.

It is an arithmetic number, because the mean of its divisors is an integer number (5114394432).

Almost surely, 2^20404302403 is an apocalyptic number.

20404302403 is a deficient number, since it is larger than the sum of its proper divisors (53275325).

20404302403 is an equidigital number, since it uses as much as digits as its factorization.

20404302403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53275324.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20404302403 its reverse (30420340402), we get a palindrome (50824642805).

The spelling of 20404302403 in words is "twenty billion, four hundred four million, three hundred two thousand, four hundred three".