20304323403 has 48 divisors (see below), whose sum is σ = 33954389280. Its totient is φ = 10697508864.

The previous prime is 20304323399. The next prime is 20304323411. The reversal of 20304323403 is 30432340302.

It is not a de Polignac number, because 20304323403 - 2² = 20304323399 is a prime.

It is a super-2 number, since 2×20304323403² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20304323443) 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 47 ways as a sum of consecutive naturals, for example, 1769601 + ... + 1781037.

It is an arithmetic number, because the mean of its divisors is an integer number (707383110).

Almost surely, 2^20304323403 is an apocalyptic number.

20304323403 is a deficient number, since it is larger than the sum of its proper divisors (13650065877).

20304323403 is a wasteful number, since it uses less digits than its factorization.

20304323403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12396 (or 12389 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 24.

Adding to 20304323403 its reverse (30432340302), we get a palindrome (50736663705).

The spelling of 20304323403 in words is "twenty billion, three hundred four million, three hundred twenty-three thousand, four hundred three".