21182130860 has 24 divisors (see below), whose sum is σ = 48526336656. Its totient is φ = 7702592960.

The previous prime is 21182130821. The next prime is 21182130953. The reversal of 21182130860 is 6803128112.

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 7 ways as a sum of consecutive naturals, for example, 48140987 + ... + 48141426.

It is an arithmetic number, because the mean of its divisors is an integer number (2021930694).

Almost surely, 2^21182130860 is an apocalyptic number.

21182130860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21182130860 is an abundant number, since it is smaller than the sum of its proper divisors (27344205796).

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

21182130860 is a wasteful number, since it uses less digits than its factorization.

21182130860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96282433 (or 96282431 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

Adding to 21182130860 its reverse (6803128112), we get a palindrome (27985258972).

The spelling of 21182130860 in words is "twenty-one billion, one hundred eighty-two million, one hundred thirty thousand, eight hundred sixty".