20144424389 has 2 divisors, whose sum is σ = 20144424390. Its totient is φ = 20144424388.

The previous prime is 20144424379. The next prime is 20144424437. The reversal of 20144424389 is 98342444102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12778493764 + 7365930625 = 113042^2 + 85825^2 .

It is a cyclic number.

It is not a de Polignac number, because 20144424389 - 2⁴ = 20144424373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20144424379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072212194 + 10072212195.

It is an arithmetic number, because the mean of its divisors is an integer number (10072212195).

Almost surely, 2^20144424389 is an apocalyptic number.

It is an amenable number.

20144424389 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144424389 is an equidigital number, since it uses as much as digits as its factorization.

20144424389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 20144424389 in words is "twenty billion, one hundred forty-four million, four hundred twenty-four thousand, three hundred eighty-nine".