8180218836 has 36 divisors (see below), whose sum is σ = 21443621472. Its totient is φ = 2726739288.

The previous prime is 8180218829. The next prime is 8180218859. The reversal of 8180218836 is 6388120818.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×8180218836³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8180218791 and 8180218800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4206960 + ... + 4208903.

It is an arithmetic number, because the mean of its divisors is an integer number (595656152).

Almost surely, 2^8180218836 is an apocalyptic number.

It is an amenable number.

8180218836 is an abundant number, since it is smaller than the sum of its proper divisors (13263402636).

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

8180218836 is a wasteful number, since it uses less digits than its factorization.

8180218836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8415882 (or 8415868 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 8180218836 is about 90444.5622246025. The cubic root of 8180218836 is about 2014.9068531549.

The spelling of 8180218836 in words is "eight billion, one hundred eighty million, two hundred eighteen thousand, eight hundred thirty-six".