21413306535 has 32 divisors (see below), whose sum is σ = 34923813120. Its totient is φ = 11201572608.

The previous prime is 21413306533. The next prime is 21413306599. The reversal of 21413306535 is 53560331412.

It is not a de Polignac number, because 21413306535 - 2¹ = 21413306533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21413306496 and 21413306505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21413306533) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 111187 + ... + 234923.

It is an arithmetic number, because the mean of its divisors is an integer number (1091369160).

Almost surely, 2^21413306535 is an apocalyptic number.

21413306535 is a deficient number, since it is larger than the sum of its proper divisors (13510506585).

21413306535 is a wasteful number, since it uses less digits than its factorization.

21413306535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123967.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 21413306535 its reverse (53560331412), we get a palindrome (74973637947).

The spelling of 21413306535 in words is "twenty-one billion, four hundred thirteen million, three hundred six thousand, five hundred thirty-five".