21330532403539 has 2 divisors, whose sum is σ = 21330532403540. Its totient is φ = 21330532403538.

The previous prime is 21330532403497. The next prime is 21330532403549. The reversal of 21330532403539 is 93530423503312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330532403539 is a prime.

It is a super-2 number, since 2×21330532403539² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21330532403495 and 21330532403504.

It is not a weakly prime, because it can be changed into another prime (21330532403549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665266201769 + 10665266201770.

It is an arithmetic number, because the mean of its divisors is an integer number (10665266201770).

Almost surely, 2^{21330532403539} is an apocalyptic number.

21330532403539 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330532403539 is an equidigital number, since it uses as much as digits as its factorization.

21330532403539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 43.

The spelling of 21330532403539 in words is "twenty-one trillion, three hundred thirty billion, five hundred thirty-two million, four hundred three thousand, five hundred thirty-nine".