20442440242489 has 2 divisors, whose sum is σ = 20442440242490. Its totient is φ = 20442440242488.

The previous prime is 20442440242423. The next prime is 20442440242513. The reversal of 20442440242489 is 98424204424402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19073090925625 + 1369349316864 = 4367275^2 + 1170192^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442440242489 - 2²⁹ = 20441903371577 is a prime.

It is not a weakly prime, because it can be changed into another prime (20442440246489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221220121244 + 10221220121245.

It is an arithmetic number, because the mean of its divisors is an integer number (10221220121245).

Almost surely, 2^{20442440242489} is an apocalyptic number.

It is an amenable number.

20442440242489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442440242489 is an equidigital number, since it uses as much as digits as its factorization.

20442440242489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4718592, while the sum is 49.

The spelling of 20442440242489 in words is "twenty trillion, four hundred forty-two billion, four hundred forty million, two hundred forty-two thousand, four hundred eighty-nine".