21507905884482 has 24 divisors (see below), whose sum is σ = 46605565532604. Its totient is φ = 7168516917984.

The previous prime is 21507905884457. The next prime is 21507905884529. The reversal of 21507905884482 is 28448850970512.

21507905884482 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 7 + 9 + 0 + 588 + 4 + 48 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21490539652521 + 17366231961 = 4635789^2 + 131781^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65251333 + ... + 65580120.

Almost surely, 2^{21507905884482} is an apocalyptic number.

21507905884482 is an abundant number, since it is smaller than the sum of its proper divisors (25097659648122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21507905884482 is a wasteful number, since it uses less digits than its factorization.

21507905884482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130840594 (or 130840591 counting only the distinct ones).

The product of its (nonzero) digits is 51609600, while the sum is 63.

The spelling of 21507905884482 in words is "twenty-one trillion, five hundred seven billion, nine hundred five million, eight hundred eighty-four thousand, four hundred eighty-two".