20324431231 has 8 divisors (see below), whose sum is σ = 21889005264. Its totient is φ = 18760022400.

The previous prime is 20324431189. The next prime is 20324431241. The reversal of 20324431231 is 13213442302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20324431231 - 2¹³ = 20324423039 is a prime.

It is a super-2 number, since 2×20324431231² (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 = 20324431196 and 20324431205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20324431241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355431 + ... + 408631.

It is an arithmetic number, because the mean of its divisors is an integer number (2736125658).

Almost surely, 2^20324431231 is an apocalyptic number.

20324431231 is a deficient number, since it is larger than the sum of its proper divisors (1564574033).

20324431231 is a wasteful number, since it uses less digits than its factorization.

20324431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82601.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20324431231 its reverse (13213442302), we get a palindrome (33537873533).

The spelling of 20324431231 in words is "twenty billion, three hundred twenty-four million, four hundred thirty-one thousand, two hundred thirty-one".