20304113403 has 16 divisors (see below), whose sum is σ = 30945770496. Its totient is φ = 11600037120.

The previous prime is 20304113399. The next prime is 20304113413. The reversal of 20304113403 is 30431140302.

It is not a de Polignac number, because 20304113403 - 2² = 20304113399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20304113403.

It is not an unprimeable number, because it can be changed into a prime (20304113413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14398 + ... + 202028.

It is an arithmetic number, because the mean of its divisors is an integer number (1934110656).

Almost surely, 2^20304113403 is an apocalyptic number.

20304113403 is a deficient number, since it is larger than the sum of its proper divisors (10641657093).

20304113403 is a wasteful number, since it uses less digits than its factorization.

20304113403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192794.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20304113403 its reverse (30431140302), we get a palindrome (50735253705).

The spelling of 20304113403 in words is "twenty billion, three hundred four million, one hundred thirteen thousand, four hundred three".