20044765142989 has 2 divisors, whose sum is σ = 20044765142990. Its totient is φ = 20044765142988.

The previous prime is 20044765142971. The next prime is 20044765143017. The reversal of 20044765142989 is 98924156744002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14146098876900 + 5898666266089 = 3761130^2 + 2428717^2 .

It is a cyclic number.

It is not a de Polignac number, because 20044765142989 - 2²¹ = 20044763045837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20044765142789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022382571494 + 10022382571495.

It is an arithmetic number, because the mean of its divisors is an integer number (10022382571495).

Almost surely, 2^{20044765142989} is an apocalyptic number.

It is an amenable number.

20044765142989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20044765142989 is an equidigital number, since it uses as much as digits as its factorization.

20044765142989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 20044765142989 in words is "twenty trillion, forty-four billion, seven hundred sixty-five million, one hundred forty-two thousand, nine hundred eighty-nine".