21112641896 has 32 divisors (see below), whose sum is σ = 42267994560. Its totient is φ = 9862524672.

The previous prime is 21112641889. The next prime is 21112641923. The reversal of 21112641896 is 69814621112.

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 in 7 ways as a sum of consecutive naturals, for example, 1326305 + ... + 1342128.

It is an arithmetic number, because the mean of its divisors is an integer number (1320874830).

Almost surely, 2^21112641896 is an apocalyptic number.

It is an amenable number.

21112641896 is an abundant number, since it is smaller than the sum of its proper divisors (21155352664).

21112641896 is a wasteful number, since it uses less digits than its factorization.

21112641896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668505 (or 2668501 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The spelling of 21112641896 in words is "twenty-one billion, one hundred twelve million, six hundred forty-one thousand, eight hundred ninety-six".