20312242443 has 12 divisors (see below), whose sum is σ = 29451467760. Its totient is φ = 13490004816.

The previous prime is 20312242439. The next prime is 20312242451. The reversal of 20312242443 is 34424221302.

20312242443 is a `hidden beast` number, since 203 + 12 + 2 + 4 + 2 + 443 = 666.

It is not a de Polignac number, because 20312242443 - 2² = 20312242439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20312242403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4288348 + ... + 4293081.

It is an arithmetic number, because the mean of its divisors is an integer number (2454288980).

Almost surely, 2^20312242443 is an apocalyptic number.

20312242443 is a deficient number, since it is larger than the sum of its proper divisors (9139225317).

20312242443 is a wasteful number, since it uses less digits than its factorization.

20312242443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8581698 (or 8581695 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20312242443 its reverse (34424221302), we get a palindrome (54736463745).

The spelling of 20312242443 in words is "twenty billion, three hundred twelve million, two hundred forty-two thousand, four hundred forty-three".