21435545241 has 80 divisors (see below), whose sum is σ = 35623577088. Its totient is φ = 12735532800.

The previous prime is 21435545239. The next prime is 21435545249. The reversal of 21435545241 is 14254553412.

21435545241 is a `hidden beast` number, since 2 + 14 + 3 + 554 + 52 + 41 = 666.

It is not a de Polignac number, because 21435545241 - 2¹ = 21435545239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21435545196 and 21435545205.

It is not an unprimeable number, because it can be changed into a prime (21435545249) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 24837976 + ... + 24838838.

Almost surely, 2^21435545241 is an apocalyptic number.

It is an amenable number.

21435545241 is a deficient number, since it is larger than the sum of its proper divisors (14188031847).

21435545241 is a wasteful number, since it uses less digits than its factorization.

21435545241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1395 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 21435545241 in words is "twenty-one billion, four hundred thirty-five million, five hundred forty-five thousand, two hundred forty-one".