21168130910 has 16 divisors (see below), whose sum is σ = 38121451200. Its totient is φ = 8463071136.

The previous prime is 21168130909. The next prime is 21168130931. The reversal of 21168130910 is 1903186112.

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 7 ways as a sum of consecutive naturals, for example, 501350 + ... + 541929.

It is an arithmetic number, because the mean of its divisors is an integer number (2382590700).

Almost surely, 2^21168130910 is an apocalyptic number.

21168130910 is a deficient number, since it is larger than the sum of its proper divisors (16953320290).

21168130910 is a wasteful number, since it uses less digits than its factorization.

21168130910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045315.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 21168130910 in words is "twenty-one billion, one hundred sixty-eight million, one hundred thirty thousand, nine hundred ten".