18409954907 has 2 divisors, whose sum is σ = 18409954908. Its totient is φ = 18409954906.

The previous prime is 18409954859. The next prime is 18409954909. The reversal of 18409954907 is 70945990481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18409954907 - 2¹⁴ = 18409938523 is a prime.

Together with 18409954909, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18409954909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9204977453 + 9204977454.

It is an arithmetic number, because the mean of its divisors is an integer number (9204977454).

Almost surely, 2^18409954907 is an apocalyptic number.

18409954907 is a deficient number, since it is larger than the sum of its proper divisors (1).

18409954907 is an equidigital number, since it uses as much as digits as its factorization.

18409954907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 18409954907 in words is "eighteen billion, four hundred nine million, nine hundred fifty-four thousand, nine hundred seven".