18441411121 has 20 divisors (see below), whose sum is σ = 21561661044. Its totient is φ = 15771688800.

The previous prime is 18441411067. The next prime is 18441411127. The reversal of 18441411121 is 12111414481.

It can be written as a sum of positive squares in 2 ways, for example, as 7445791521 + 10995619600 = 86289^2 + 104860^2 .

It is not a de Polignac number, because 18441411121 - 2⁹ = 18441410609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18441411121.

It is not an unprimeable number, because it can be changed into a prime (18441411127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1098531 + ... + 1115191.

Almost surely, 2^18441411121 is an apocalyptic number.

It is an amenable number.

18441411121 is a deficient number, since it is larger than the sum of its proper divisors (3120249923).

18441411121 is an frugal number, since it uses more digits than its factorization.

18441411121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17150 (or 17129 counting only the distinct ones).

The product of its digits is 1024, while the sum is 28.

The spelling of 18441411121 in words is "eighteen billion, four hundred forty-one million, four hundred eleven thousand, one hundred twenty-one".