20324431243 has 16 divisors (see below), whose sum is σ = 21793048704. Its totient is φ = 18887086080.

The previous prime is 20324431241. The next prime is 20324431247. The reversal of 20324431243 is 34213442302.

It is a cyclic number.

It is not a de Polignac number, because 20324431243 - 2¹ = 20324431241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20324431241) 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, 696421 + ... + 725017.

It is an arithmetic number, because the mean of its divisors is an integer number (1362065544).

Almost surely, 2^20324431243 is an apocalyptic number.

20324431243 is a deficient number, since it is larger than the sum of its proper divisors (1468617461).

20324431243 is a wasteful number, since it uses less digits than its factorization.

20324431243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29142.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20324431243 its reverse (34213442302), we get a palindrome (54537873545).

The spelling of 20324431243 in words is "twenty billion, three hundred twenty-four million, four hundred thirty-one thousand, two hundred forty-three".