20444243023 has 4 divisors (see below), whose sum is σ = 20690559288. Its totient is φ = 20197926760.

The previous prime is 20444243021. The next prime is 20444243047. The reversal of 20444243023 is 32034244402.

It is a happy number.

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 20444243023 - 2¹ = 20444243021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20444242982 and 20444243000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444243021) 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, 123158008 + ... + 123158173.

It is an arithmetic number, because the mean of its divisors is an integer number (5172639822).

Almost surely, 2^20444243023 is an apocalyptic number.

20444243023 is a deficient number, since it is larger than the sum of its proper divisors (246316265).

20444243023 is an equidigital number, since it uses as much as digits as its factorization.

20444243023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246316264.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20444243023 its reverse (32034244402), we get a palindrome (52478487425).

The spelling of 20444243023 in words is "twenty billion, four hundred forty-four million, two hundred forty-three thousand, twenty-three".