18298639769 has 2 divisors, whose sum is σ = 18298639770. Its totient is φ = 18298639768.

The previous prime is 18298639703. The next prime is 18298639771. The reversal of 18298639769 is 96793689281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15853831744 + 2444808025 = 125912^2 + 49445^2 .

It is a cyclic number.

It is not a de Polignac number, because 18298639769 - 2¹⁶ = 18298574233 is a prime.

It is a super-2 number, since 2×18298639769² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 18298639771, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18298639699 and 18298639708.

It is not a weakly prime, because it can be changed into another prime (18298639169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9149319884 + 9149319885.

It is an arithmetic number, because the mean of its divisors is an integer number (9149319885).

Almost surely, 2^18298639769 is an apocalyptic number.

It is an amenable number.

18298639769 is a deficient number, since it is larger than the sum of its proper divisors (1).

18298639769 is an equidigital number, since it uses as much as digits as its factorization.

18298639769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70543872, while the sum is 68.

The spelling of 18298639769 in words is "eighteen billion, two hundred ninety-eight million, six hundred thirty-nine thousand, seven hundred sixty-nine".