21682241316 has 36 divisors (see below), whose sum is σ = 54812389632. Its totient is φ = 7226820144.

The previous prime is 21682241299. The next prime is 21682241327. The reversal of 21682241316 is 61314228612.

It is a happy number.

21682241316 is a `hidden beast` number, since 21 + 6 + 82 + 241 + 316 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 765381 + ... + 793203.

Almost surely, 2^21682241316 is an apocalyptic number.

It is an amenable number.

21682241316 is an abundant number, since it is smaller than the sum of its proper divisors (33130148316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21682241316 is a wasteful number, since it uses less digits than its factorization.

21682241316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49480 (or 49475 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

Adding to 21682241316 its reverse (61314228612), we get a palindrome (82996469928).

The spelling of 21682241316 in words is "twenty-one billion, six hundred eighty-two million, two hundred forty-one thousand, three hundred sixteen".