18441279121 has 8 divisors (see below), whose sum is σ = 18620915040. Its totient is φ = 18261778368.

The previous prime is 18441279071. The next prime is 18441279211. The reversal of 18441279121 is 12197214481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18441279121 - 2⁷ = 18441278993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18445279121) 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 in 7 ways as a sum of consecutive naturals, for example, 252105 + ... + 316921.

It is an arithmetic number, because the mean of its divisors is an integer number (2327614380).

Almost surely, 2^18441279121 is an apocalyptic number.

It is an amenable number.

18441279121 is a deficient number, since it is larger than the sum of its proper divisors (179635919).

18441279121 is a wasteful number, since it uses less digits than its factorization.

18441279121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67583.

The product of its digits is 32256, while the sum is 40.

The spelling of 18441279121 in words is "eighteen billion, four hundred forty-one million, two hundred seventy-nine thousand, one hundred twenty-one".