20440440220169 has 2 divisors, whose sum is σ = 20440440220170. Its totient is φ = 20440440220168.

The previous prime is 20440440220159. The next prime is 20440440220229. The reversal of 20440440220169 is 96102204404402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14664204795769 + 5776235424400 = 3829387^2 + 2403380^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440440220169 - 2¹² = 20440440216073 is a prime.

It is a super-2 number, since 2×20440440220169² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20440440220159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220220110084 + 10220220110085.

It is an arithmetic number, because the mean of its divisors is an integer number (10220220110085).

Almost surely, 2^{20440440220169} is an apocalyptic number.

It is an amenable number.

20440440220169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440440220169 is an equidigital number, since it uses as much as digits as its factorization.

20440440220169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 20440440220169 in words is "twenty trillion, four hundred forty billion, four hundred forty million, two hundred twenty thousand, one hundred sixty-nine".