21152530521308 has 12 divisors (see below), whose sum is σ = 37170525627312. Its totient is φ = 10532380342080.

The previous prime is 21152530521289. The next prime is 21152530521359. The reversal of 21152530521308 is 80312503525112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10971228560 + ... + 10971230487.

It is an arithmetic number, because the mean of its divisors is an integer number (3097543802276).

Almost surely, 2^{21152530521308} is an apocalyptic number.

It is an amenable number.

21152530521308 is a deficient number, since it is larger than the sum of its proper divisors (16017995106004).

21152530521308 is a wasteful number, since it uses less digits than its factorization.

21152530521308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21942459292 (or 21942459290 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 21152530521308 in words is "twenty-one trillion, one hundred fifty-two billion, five hundred thirty million, five hundred twenty-one thousand, three hundred eight".