18876171408 has 120 divisors (see below), whose sum is σ = 52054183200. Its totient is φ = 5892956160.

The previous prime is 18876171407. The next prime is 18876171409. The reversal of 18876171408 is 80417167881.

It is an interprime number because it is at equal distance from previous prime (18876171407) and next prime (18876171409).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (18876171407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2923768 + ... + 2930216.

It is an arithmetic number, because the mean of its divisors is an integer number (433784860).

Almost surely, 2^18876171408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18876171408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26027091600).

18876171408 is an abundant number, since it is smaller than the sum of its proper divisors (33178011792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18876171408 is a wasteful number, since it uses less digits than its factorization.

18876171408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705 (or 6682 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 51.

The spelling of 18876171408 in words is "eighteen billion, eight hundred seventy-six million, one hundred seventy-one thousand, four hundred eight".