20043444561423 has 16 divisors (see below), whose sum is σ = 26974573209216. Its totient is φ = 13237308162080.

The previous prime is 20043444561421. The next prime is 20043444561443. The reversal of 20043444561423 is 32416544434002.

It is a cyclic number.

It is not a de Polignac number, because 20043444561423 - 2¹ = 20043444561421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043444561421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69835753 + ... + 70122173.

It is an arithmetic number, because the mean of its divisors is an integer number (1685910825576).

Almost surely, 2^{20043444561423} is an apocalyptic number.

20043444561423 is a deficient number, since it is larger than the sum of its proper divisors (6931128647793).

20043444561423 is a wasteful number, since it uses less digits than its factorization.

20043444561423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504534.

The product of its (nonzero) digits is 1105920, while the sum is 42.

Adding to 20043444561423 its reverse (32416544434002), we get a palindrome (52459988995425).

The spelling of 20043444561423 in words is "twenty trillion, forty-three billion, four hundred forty-four million, five hundred sixty-one thousand, four hundred twenty-three".