21345324135 has 8 divisors (see below), whose sum is σ = 34152518640. Its totient is φ = 11384172864.

The previous prime is 21345324113. The next prime is 21345324139. The reversal of 21345324135 is 53142354312.

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

It is not a de Polignac number, because 21345324135 - 2¹⁵ = 21345291367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21345324096 and 21345324105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21345324139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711510790 + ... + 711510819.

It is an arithmetic number, because the mean of its divisors is an integer number (4269064830).

Almost surely, 2^21345324135 is an apocalyptic number.

21345324135 is a deficient number, since it is larger than the sum of its proper divisors (12807194505).

21345324135 is a wasteful number, since it uses less digits than its factorization.

21345324135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423021617.

The product of its digits is 43200, while the sum is 33.

Adding to 21345324135 its reverse (53142354312), we get a palindrome (74487678447).

The spelling of 21345324135 in words is "twenty-one billion, three hundred forty-five million, three hundred twenty-four thousand, one hundred thirty-five".