20315112242443 has 4 divisors (see below), whose sum is σ = 20316246612480. Its totient is φ = 20313977872408.

The previous prime is 20315112242407. The next prime is 20315112242489. The reversal of 20315112242443 is 34424221151302.

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-20315112242443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20315112242399 and 20315112242408.

It is not an unprimeable number, because it can be changed into a prime (20315112842443) 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, 567158155 + ... + 567193972.

It is an arithmetic number, because the mean of its divisors is an integer number (5079061653120).

Almost surely, 2^{20315112242443} is an apocalyptic number.

20315112242443 is a deficient number, since it is larger than the sum of its proper divisors (1134370037).

20315112242443 is a wasteful number, since it uses less digits than its factorization.

20315112242443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134370036.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 20315112242443 its reverse (34424221151302), we get a palindrome (54739333393745).

The spelling of 20315112242443 in words is "twenty trillion, three hundred fifteen billion, one hundred twelve million, two hundred forty-two thousand, four hundred forty-three".