20301324431 has 4 divisors (see below), whose sum is σ = 20733267552. Its totient is φ = 19869381312.

The previous prime is 20301324409. The next prime is 20301324451. The reversal of 20301324431 is 13442310302.

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-20301324431 is a prime.

It is a super-2 number, since 2×20301324431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20301324397 and 20301324406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20301324451) 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, 215971490 + ... + 215971583.

It is an arithmetic number, because the mean of its divisors is an integer number (5183316888).

Almost surely, 2^20301324431 is an apocalyptic number.

20301324431 is a deficient number, since it is larger than the sum of its proper divisors (431943121).

20301324431 is an equidigital number, since it uses as much as digits as its factorization.

20301324431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431943120.

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

Adding to 20301324431 its reverse (13442310302), we get a palindrome (33743634733).

The spelling of 20301324431 in words is "twenty billion, three hundred one million, three hundred twenty-four thousand, four hundred thirty-one".