18424999289 has 2 divisors, whose sum is σ = 18424999290. Its totient is φ = 18424999288.

The previous prime is 18424999277. The next prime is 18424999291. The reversal of 18424999289 is 98299942481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9255979264 + 9169020025 = 96208^2 + 95755^2 .

It is a cyclic number.

It is not a de Polignac number, because 18424999289 - 2¹⁶ = 18424933753 is a prime.

It is a Sophie Germain prime.

Together with 18424999291, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18424939289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9212499644 + 9212499645.

It is an arithmetic number, because the mean of its divisors is an integer number (9212499645).

Almost surely, 2^18424999289 is an apocalyptic number.

It is an amenable number.

18424999289 is a deficient number, since it is larger than the sum of its proper divisors (1).

18424999289 is an equidigital number, since it uses as much as digits as its factorization.

18424999289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26873856, while the sum is 65.

The spelling of 18424999289 in words is "eighteen billion, four hundred twenty-four million, nine hundred ninety-nine thousand, two hundred eighty-nine".