18554434411 has 4 divisors (see below), whose sum is σ = 18554945824. Its totient is φ = 18553923000.

The previous prime is 18554434369. The next prime is 18554434487. The reversal of 18554434411 is 11443445581.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18554434411 - 2¹¹ = 18554432363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18554437411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196755 + ... + 275356.

It is an arithmetic number, because the mean of its divisors is an integer number (4638736456).

Almost surely, 2^18554434411 is an apocalyptic number.

18554434411 is a deficient number, since it is larger than the sum of its proper divisors (511413).

18554434411 is an equidigital number, since it uses as much as digits as its factorization.

18554434411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511412.

The product of its digits is 153600, while the sum is 40.

Adding to 18554434411 its reverse (11443445581), we get a palindrome (29997879992).

The spelling of 18554434411 in words is "eighteen billion, five hundred fifty-four million, four hundred thirty-four thousand, four hundred eleven".