21376683575519 has 4 divisors (see below), whose sum is σ = 21413100413544. Its totient is φ = 21340266737496.

The previous prime is 21376683575479. The next prime is 21376683575521. The reversal of 21376683575519 is 91557538667312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21376683575519 - 2³² = 21372388608223 is a prime.

It is a super-2 number, since 2×21376683575519² (a number of 27 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 (21376683565519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18208418132 + ... + 18208419305.

It is an arithmetic number, because the mean of its divisors is an integer number (5353275103386).

Almost surely, 2^{21376683575519} is an apocalyptic number.

21376683575519 is a deficient number, since it is larger than the sum of its proper divisors (36416838025).

21376683575519 is an equidigital number, since it uses as much as digits as its factorization.

21376683575519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36416838024.

The product of its digits is 285768000, while the sum is 68.

The spelling of 21376683575519 in words is "twenty-one trillion, three hundred seventy-six billion, six hundred eighty-three million, five hundred seventy-five thousand, five hundred nineteen".