21180373246688 has 24 divisors (see below), whose sum is σ = 41711385980880. Its totient is φ = 10587005378560.

The previous prime is 21180373246679. The next prime is 21180373246691. The reversal of 21180373246688 is 88664237308112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99305708 + ... + 99518763.

It is an arithmetic number, because the mean of its divisors is an integer number (1737974415870).

Almost surely, 2^{21180373246688} is an apocalyptic number.

It is an amenable number.

21180373246688 is a deficient number, since it is larger than the sum of its proper divisors (20531012734192).

21180373246688 is a wasteful number, since it uses less digits than its factorization.

21180373246688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198827810 (or 198827802 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 21180373246688 in words is "twenty-one trillion, one hundred eighty billion, three hundred seventy-three million, two hundred forty-six thousand, six hundred eighty-eight".