18171376880 has 160 divisors (see below), whose sum is σ = 44481153024. Its totient is φ = 6896590848.

The previous prime is 18171376879. The next prime is 18171376889. The reversal of 18171376880 is 8867317181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18171376889) 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, 27000224 + ... + 27000896.

Almost surely, 2^18171376880 is an apocalyptic number.

18171376880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18171376880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22240576512).

18171376880 is an abundant number, since it is smaller than the sum of its proper divisors (26309776144).

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

18171376880 is a wasteful number, since it uses less digits than its factorization.

18171376880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 937 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 50.

The spelling of 18171376880 in words is "eighteen billion, one hundred seventy-one million, three hundred seventy-six thousand, eight hundred eighty".