18481887138433 has 8 divisors (see below), whose sum is σ = 18584454901376. Its totient is φ = 18379324407600.

The previous prime is 18481887138371. The next prime is 18481887138527. The reversal of 18481887138433 is 33483178818481.

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 18481887138433 - 2⁹ = 18481887137921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18481887139433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6231298 + ... + 8705908.

It is an arithmetic number, because the mean of its divisors is an integer number (2323056862672).

Almost surely, 2^{18481887138433} is an apocalyptic number.

It is an amenable number.

18481887138433 is a deficient number, since it is larger than the sum of its proper divisors (102567762943).

18481887138433 is a wasteful number, since it uses less digits than its factorization.

18481887138433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516055.

The product of its digits is 99090432, while the sum is 67.

The spelling of 18481887138433 in words is "eighteen trillion, four hundred eighty-one billion, eight hundred eighty-seven million, one hundred thirty-eight thousand, four hundred thirty-three".