21716883888667 has 8 divisors (see below), whose sum is σ = 23714080386480. Its totient is φ = 19723509778560.

The previous prime is 21716883888629. The next prime is 21716883888709. The reversal of 21716883888667 is 76688838861712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21716883888667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21716883888617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955585042 + ... + 955607767.

It is an arithmetic number, because the mean of its divisors is an integer number (2964260048310).

Almost surely, 2^{21716883888667} is an apocalyptic number.

21716883888667 is a deficient number, since it is larger than the sum of its proper divisors (1997196497813).

21716883888667 is a wasteful number, since it uses less digits than its factorization.

21716883888667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911193853.

The product of its digits is 2080899072, while the sum is 79.

The spelling of 21716883888667 in words is "twenty-one trillion, seven hundred sixteen billion, eight hundred eighty-three million, eight hundred eighty-eight thousand, six hundred sixty-seven".