20442303101243 has 4 divisors (see below), whose sum is σ = 20442320232768. Its totient is φ = 20442285969720.

The previous prime is 20442303101191. The next prime is 20442303101303. The reversal of 20442303101243 is 34210130324402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20442303101243 - 2²⁶ = 20442235992379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20442303101543) 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, 6630068 + ... + 9210993.

It is an arithmetic number, because the mean of its divisors is an integer number (5110580058192).

Almost surely, 2^{20442303101243} is an apocalyptic number.

20442303101243 is a deficient number, since it is larger than the sum of its proper divisors (17131525).

20442303101243 is a wasteful number, since it uses less digits than its factorization.

20442303101243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17131524.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20442303101243 its reverse (34210130324402), we get a palindrome (54652433425645).

The spelling of 20442303101243 in words is "twenty trillion, four hundred forty-two billion, three hundred three million, one hundred one thousand, two hundred forty-three".