20440444023 has 12 divisors (see below), whose sum is σ = 29554073640. Its totient is φ = 13613583696.

The previous prime is 20440444007. The next prime is 20440444033. The reversal of 20440444023 is 32044404402.

It is a happy number.

It is not a de Polignac number, because 20440444023 - 2⁴ = 20440444007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440444033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1105236 + ... + 1123577.

It is an arithmetic number, because the mean of its divisors is an integer number (2462839470).

Almost surely, 2^20440444023 is an apocalyptic number.

20440444023 is a deficient number, since it is larger than the sum of its proper divisors (9113629617).

20440444023 is a wasteful number, since it uses less digits than its factorization.

20440444023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229838 (or 2229835 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 20440444023 its reverse (32044404402), we get a palindrome (52484848425).

The spelling of 20440444023 in words is "twenty billion, four hundred forty million, four hundred forty-four thousand, twenty-three".