21345288219 has 6 divisors (see below), whose sum is σ = 30832082996. Its totient is φ = 14230192140.

The previous prime is 21345288157. The next prime is 21345288227. The reversal of 21345288219 is 91288254312.

21345288219 is a `hidden beast` number, since 2 + 1 + 34 + 528 + 82 + 19 = 666.

It is not a de Polignac number, because 21345288219 - 2⁹ = 21345287707 is a prime.

It is a super-2 number, since 2×21345288219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21345288259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1185849337 + ... + 1185849354.

Almost surely, 2^21345288219 is an apocalyptic number.

21345288219 is a deficient number, since it is larger than the sum of its proper divisors (9486794777).

21345288219 is a wasteful number, since it uses less digits than its factorization.

21345288219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371698697 (or 2371698694 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 21345288219 in words is "twenty-one billion, three hundred forty-five million, two hundred eighty-eight thousand, two hundred nineteen".