21716111719 has 8 divisors (see below), whose sum is σ = 21755744640. Its totient is φ = 21676514016.

The previous prime is 21716111717. The next prime is 21716111737. The reversal of 21716111719 is 91711161712.

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

It is a cyclic number.

It is not a de Polignac number, because 21716111719 - 2¹ = 21716111717 is a prime.

It is a super-2 number, since 2×21716111719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21716111717) 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, 1432809 + ... + 1447885.

It is an arithmetic number, because the mean of its divisors is an integer number (2719468080).

Almost surely, 2^21716111719 is an apocalyptic number.

21716111719 is a deficient number, since it is larger than the sum of its proper divisors (39632921).

21716111719 is a wasteful number, since it uses less digits than its factorization.

21716111719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17609.

The product of its digits is 5292, while the sum is 37.

The spelling of 21716111719 in words is "twenty-one billion, seven hundred sixteen million, one hundred eleven thousand, seven hundred nineteen".