20324311403 has 4 divisors (see below), whose sum is σ = 22171976088. Its totient is φ = 18476646720.

The previous prime is 20324311391. The next prime is 20324311421. The reversal of 20324311403 is 30411342302.

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 20324311403 - 2²⁸ = 20055875947 is a prime.

It is a super-2 number, since 2×20324311403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20324311453) 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, 923832326 + ... + 923832347.

It is an arithmetic number, because the mean of its divisors is an integer number (5542994022).

Almost surely, 2^20324311403 is an apocalyptic number.

20324311403 is a deficient number, since it is larger than the sum of its proper divisors (1847664685).

20324311403 is a wasteful number, since it uses less digits than its factorization.

20324311403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847664684.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20324311403 its reverse (30411342302), we get a palindrome (50735653705).

The spelling of 20324311403 in words is "twenty billion, three hundred twenty-four million, three hundred eleven thousand, four hundred three".