21436536717 has 12 divisors (see below), whose sum is σ = 30965747904. Its totient is φ = 14290165320.

The previous prime is 21436536701. The next prime is 21436536731. The reversal of 21436536717 is 71763563412.

21436536717 is a `hidden beast` number, since 2 + 1 + 43 + 6 + 536 + 71 + 7 = 666.

It is not a de Polignac number, because 21436536717 - 2⁴ = 21436536701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21436536787) 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 in 11 ways as a sum of consecutive naturals, for example, 110908 + ... + 234890.

It is an arithmetic number, because the mean of its divisors is an integer number (2580478992).

Almost surely, 2^21436536717 is an apocalyptic number.

It is an amenable number.

21436536717 is a deficient number, since it is larger than the sum of its proper divisors (9529211187).

21436536717 is a wasteful number, since it uses less digits than its factorization.

21436536717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143200 (or 143197 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The spelling of 21436536717 in words is "twenty-one billion, four hundred thirty-six million, five hundred thirty-six thousand, seven hundred seventeen".