20440444240123 has 4 divisors (see below), whose sum is σ = 20440618729648. Its totient is φ = 20440269750600.

The previous prime is 20440444240121. The next prime is 20440444240163. The reversal of 20440444240123 is 32104244404402.

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 20440444240123 - 2¹ = 20440444240121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440444240121) 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, 87068928 + ... + 87303373.

It is an arithmetic number, because the mean of its divisors is an integer number (5110154682412).

Almost surely, 2^{20440444240123} is an apocalyptic number.

20440444240123 is a deficient number, since it is larger than the sum of its proper divisors (174489525).

20440444240123 is a wasteful number, since it uses less digits than its factorization.

20440444240123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174489524.

The product of its (nonzero) digits is 98304, while the sum is 34.

Adding to 20440444240123 its reverse (32104244404402), we get a palindrome (52544688644525).

The spelling of 20440444240123 in words is "twenty trillion, four hundred forty billion, four hundred forty-four million, two hundred forty thousand, one hundred twenty-three".