18094779289 has 2 divisors, whose sum is σ = 18094779290. Its totient is φ = 18094779288.

The previous prime is 18094779251. The next prime is 18094779433. The reversal of 18094779289 is 98297749081.

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., 16140432025 + 1954347264 = 127045^2 + 44208^2 .

It is a cyclic number.

It is not a de Polignac number, because 18094779289 - 2⁹ = 18094778777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18094779289.

It is not a weakly prime, because it can be changed into another prime (18094779229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9047389644 + 9047389645.

It is an arithmetic number, because the mean of its divisors is an integer number (9047389645).

Almost surely, 2^18094779289 is an apocalyptic number.

It is an amenable number.

18094779289 is a deficient number, since it is larger than the sum of its proper divisors (1).

18094779289 is an equidigital number, since it uses as much as digits as its factorization.

18094779289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 64.

The spelling of 18094779289 in words is "eighteen billion, ninety-four million, seven hundred seventy-nine thousand, two hundred eighty-nine".