19004444729 has 2 divisors, whose sum is σ = 19004444730. Its totient is φ = 19004444728.

The previous prime is 19004444713. The next prime is 19004444777. The reversal of 19004444729 is 92744440091.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17939923600 + 1064521129 = 133940^2 + 32627^2 .

It is an emirp because it is prime and its reverse (92744440091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19004444729 - 2⁴ = 19004444713 is a prime.

It is a super-2 number, since 2×19004444729² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19004444729.

It is not a weakly prime, because it can be changed into another prime (19004444029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9502222364 + 9502222365.

It is an arithmetic number, because the mean of its divisors is an integer number (9502222365).

Almost surely, 2^19004444729 is an apocalyptic number.

It is an amenable number.

19004444729 is a deficient number, since it is larger than the sum of its proper divisors (1).

19004444729 is an equidigital number, since it uses as much as digits as its factorization.

19004444729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 19004444729 in words is "nineteen billion, four million, four hundred forty-four thousand, seven hundred twenty-nine".