19444444444429 has 2 divisors, whose sum is σ = 19444444444430. Its totient is φ = 19444444444428.

The previous prime is 19444444444423. The next prime is 19444444444459. The reversal of 19444444444429 is 92444444444491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19236688981225 + 207755463204 = 4385965^2 + 455802^2 .

It is an emirp because it is prime and its reverse (92444444444491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19444444444429 - 2¹³ = 19444444436237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19444444444423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9722222222214 + 9722222222215.

It is an arithmetic number, because the mean of its divisors is an integer number (9722222222215).

Almost surely, 2^{19444444444429} is an apocalyptic number.

It is an amenable number.

19444444444429 is a deficient number, since it is larger than the sum of its proper divisors (1).

19444444444429 is an equidigital number, since it uses as much as digits as its factorization.

19444444444429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169869312, while the sum is 61.

The spelling of 19444444444429 in words is "nineteen trillion, four hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred twenty-nine".