21719322519 has 8 divisors (see below), whose sum is σ = 30662573040. Its totient is φ = 13627810176.

The previous prime is 21719322511. The next prime is 21719322539. The reversal of 21719322519 is 91522391712.

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

It is not a de Polignac number, because 21719322519 - 2³ = 21719322511 is a prime.

It is a super-2 number, since 2×21719322519² (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 (21719322511) 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, 212934484 + ... + 212934585.

It is an arithmetic number, because the mean of its divisors is an integer number (3832821630).

Almost surely, 2^21719322519 is an apocalyptic number.

21719322519 is a deficient number, since it is larger than the sum of its proper divisors (8943250521).

21719322519 is a wasteful number, since it uses less digits than its factorization.

21719322519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425869089.

The product of its digits is 68040, while the sum is 42.

The spelling of 21719322519 in words is "twenty-one billion, seven hundred nineteen million, three hundred twenty-two thousand, five hundred nineteen".