20324121403 has 4 divisors (see below), whose sum is σ = 20326259800. Its totient is φ = 20321983008.

The previous prime is 20324121397. The next prime is 20324121407. The reversal of 20324121403 is 30412142302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30412142302 = 2 ⋅15206071151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324121403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20324121407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1054878 + ... + 1073971.

It is an arithmetic number, because the mean of its divisors is an integer number (5081564950).

Almost surely, 2^20324121403 is an apocalyptic number.

20324121403 is a deficient number, since it is larger than the sum of its proper divisors (2138397).

20324121403 is an equidigital number, since it uses as much as digits as its factorization.

20324121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138396.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20324121403 its reverse (30412142302), we get a palindrome (50736263705).

It can be divided in two parts, 20 and 324121403, that added together give a palindrome (324121423).

The spelling of 20324121403 in words is "twenty billion, three hundred twenty-four million, one hundred twenty-one thousand, four hundred three".