18044484067851 has 32 divisors (see below), whose sum is σ = 25386834198528. Its totient is φ = 11383575983520.

The previous prime is 18044484067849. The next prime is 18044484067853. The reversal of 18044484067851 is 15876048444081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18044484067849) and next prime (18044484067853).

It is not a de Polignac number, because 18044484067851 - 2¹ = 18044484067849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18044484067853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2949850 + ... + 6692576.

It is an arithmetic number, because the mean of its divisors is an integer number (793338568704).

Almost surely, 2^{18044484067851} is an apocalyptic number.

18044484067851 is a deficient number, since it is larger than the sum of its proper divisors (7342350130677).

18044484067851 is a wasteful number, since it uses less digits than its factorization.

18044484067851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743911.

The product of its (nonzero) digits is 27525120, while the sum is 60.

The spelling of 18044484067851 in words is "eighteen trillion, forty-four billion, four hundred eighty-four million, sixty-seven thousand, eight hundred fifty-one".