11821548818 has 4 divisors (see below), whose sum is σ = 17732323230. Its totient is φ = 5910774408.

The previous prime is 11821548811. The next prime is 11821548833. The reversal of 11821548818 is 81884512811.

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

It can be written as a sum of positive squares in only one way, i.e., 9148348609 + 2673200209 = 95647^2 + 51703^2 .

It is not an unprimeable number, because it can be changed into a prime (11821548811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2955387203 + ... + 2955387206.

Almost surely, 2^11821548818 is an apocalyptic number.

11821548818 is a deficient number, since it is larger than the sum of its proper divisors (5910774412).

11821548818 is an equidigital number, since it uses as much as digits as its factorization.

11821548818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910774411.

The product of its digits is 163840, while the sum is 47.

The spelling of 11821548818 in words is "eleven billion, eight hundred twenty-one million, five hundred forty-eight thousand, eight hundred eighteen".