18238436871 has 8 divisors (see below), whose sum is σ = 24318941424. Its totient is φ = 12158445120.

The previous prime is 18238436861. The next prime is 18238436897. The reversal of 18238436871 is 17863483281.

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

It is not a de Polignac number, because 18238436871 - 2¹⁰ = 18238435847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18238436861) 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, 35670 + ... + 194291.

It is an arithmetic number, because the mean of its divisors is an integer number (3039867678).

Almost surely, 2^18238436871 is an apocalyptic number.

18238436871 is a deficient number, since it is larger than the sum of its proper divisors (6080504553).

18238436871 is a wasteful number, since it uses less digits than its factorization.

18238436871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256401.

The product of its digits is 1548288, while the sum is 51.

The spelling of 18238436871 in words is "eighteen billion, two hundred thirty-eight million, four hundred thirty-six thousand, eight hundred seventy-one".