21918073110968 has 16 divisors (see below), whose sum is σ = 42098737988160. Its totient is φ = 10691742980800.

The previous prime is 21918073110959. The next prime is 21918073111003. The reversal of 21918073110968 is 86901137081912.

It is a happy number.

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, 33411696488 + ... + 33411697143.

It is an arithmetic number, because the mean of its divisors is an integer number (2631171124260).

Almost surely, 2^{21918073110968} is an apocalyptic number.

It is an amenable number.

21918073110968 is a deficient number, since it is larger than the sum of its proper divisors (20180664877192).

21918073110968 is a wasteful number, since it uses less digits than its factorization.

21918073110968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66823393678 (or 66823393674 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 56.

The spelling of 21918073110968 in words is "twenty-one trillion, nine hundred eighteen billion, seventy-three million, one hundred ten thousand, nine hundred sixty-eight".