21525546105 has 96 divisors (see below), whose sum is σ = 44739422208. Its totient is φ = 9366451200.

The previous prime is 21525546083. The next prime is 21525546113. The reversal of 21525546105 is 50164552512.

21525546105 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 5 + 546 + 105 = 666.

It is not a de Polignac number, because 21525546105 - 2¹⁸ = 21525283961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21525546105.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 577597 + ... + 613733.

It is an arithmetic number, because the mean of its divisors is an integer number (466035648).

Almost surely, 2^21525546105 is an apocalyptic number.

It is an amenable number.

21525546105 is an abundant number, since it is smaller than the sum of its proper divisors (23213876103).

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

21525546105 is a wasteful number, since it uses less digits than its factorization.

21525546105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36247 (or 36244 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 21525546105 in words is "twenty-one billion, five hundred twenty-five million, five hundred forty-six thousand, one hundred five".