21416684319 has 6 divisors (see below), whose sum is σ = 30935210696. Its totient is φ = 14277789540.

The previous prime is 21416684297. The next prime is 21416684323. The reversal of 21416684319 is 91348661412.

It is not a de Polignac number, because 21416684319 - 2⁵ = 21416684287 is a prime.

It is a super-2 number, since 2×21416684319² (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 (21416684339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1189815787 + ... + 1189815804.

Almost surely, 2^21416684319 is an apocalyptic number.

21416684319 is a deficient number, since it is larger than the sum of its proper divisors (9518526377).

21416684319 is a wasteful number, since it uses less digits than its factorization.

21416684319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379631597 (or 2379631594 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 21416684319 in words is "twenty-one billion, four hundred sixteen million, six hundred eighty-four thousand, three hundred nineteen".