18554242699 has 2 divisors, whose sum is σ = 18554242700. Its totient is φ = 18554242698.

The previous prime is 18554242657. The next prime is 18554242711. The reversal of 18554242699 is 99624245581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18554242699 - 2¹¹ = 18554240651 is a prime.

It is not a weakly prime, because it can be changed into another prime (18554242639) 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, 9277121349 + 9277121350.

It is an arithmetic number, because the mean of its divisors is an integer number (9277121350).

Almost surely, 2^18554242699 is an apocalyptic number.

18554242699 is a deficient number, since it is larger than the sum of its proper divisors (1).

18554242699 is an equidigital number, since it uses as much as digits as its factorization.

18554242699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 55.

The spelling of 18554242699 in words is "eighteen billion, five hundred fifty-four million, two hundred forty-two thousand, six hundred ninety-nine".