21116717006 has 64 divisors (see below), whose sum is σ = 40810784256. Its totient is φ = 7956144000.

The previous prime is 21116716949. The next prime is 21116717009. The reversal of 21116717006 is 60071761112.

It is a super-2 number, since 2×21116717006² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116717009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 653036 + ... + 684608.

It is an arithmetic number, because the mean of its divisors is an integer number (637668504).

Almost surely, 2^21116717006 is an apocalyptic number.

21116717006 is a deficient number, since it is larger than the sum of its proper divisors (19694067250).

21116717006 is a wasteful number, since it uses less digits than its factorization.

21116717006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31737.

The product of its (nonzero) digits is 3528, while the sum is 32.

The spelling of 21116717006 in words is "twenty-one billion, one hundred sixteen million, seven hundred seventeen thousand, six".