21716886919 has 8 divisors (see below), whose sum is σ = 26728476320. Its totient is φ = 17182591776.

The previous prime is 21716886887. The next prime is 21716886949. The reversal of 21716886919 is 91968861712.

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

It is not a de Polignac number, because 21716886919 - 2⁵ = 21716886887 is a prime.

It is a super-2 number, since 2×21716886919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21716886949) 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, 119323464 + ... + 119323645.

It is an arithmetic number, because the mean of its divisors is an integer number (3341059540).

Almost surely, 2^21716886919 is an apocalyptic number.

21716886919 is a deficient number, since it is larger than the sum of its proper divisors (5011589401).

21716886919 is a wasteful number, since it uses less digits than its factorization.

21716886919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238647129.

The product of its digits is 2612736, while the sum is 58.

The spelling of 21716886919 in words is "twenty-one billion, seven hundred sixteen million, eight hundred eighty-six thousand, nine hundred nineteen".