21345130682 has 8 divisors (see below), whose sum is σ = 32036612916. Its totient is φ = 10666259712.

The previous prime is 21345130679. The next prime is 21345130711. The reversal of 21345130682 is 28603154312.

It can be written as a sum of positive squares in 2 ways, for example, as 21161229961 + 183900721 = 145469^2 + 13561^2 .

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

It is a super-2 number, since 2×21345130682² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 3148583 + ... + 3155354.

Almost surely, 2^21345130682 is an apocalyptic number.

21345130682 is a deficient number, since it is larger than the sum of its proper divisors (10691482234).

21345130682 is a wasteful number, since it uses less digits than its factorization.

21345130682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305632.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 21345130682 its reverse (28603154312), we get a palindrome (49948284994).

The spelling of 21345130682 in words is "twenty-one billion, three hundred forty-five million, one hundred thirty thousand, six hundred eighty-two".