21130108976 has 10 divisors (see below), whose sum is σ = 40939586172. Its totient is φ = 10565054480.

The previous prime is 21130108957. The next prime is 21130109017. The reversal of 21130108976 is 67980103112.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 660315890 + ... + 660315921.

Almost surely, 2^21130108976 is an apocalyptic number.

It is an amenable number.

21130108976 is a deficient number, since it is larger than the sum of its proper divisors (19809477196).

21130108976 is a wasteful number, since it uses less digits than its factorization.

21130108976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320631819 (or 1320631813 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 21130108976 in words is "twenty-one billion, one hundred thirty million, one hundred eight thousand, nine hundred seventy-six".