21707846136 has 24 divisors (see below), whose sum is σ = 58792083480. Its totient is φ = 7235948688.

The previous prime is 21707846117. The next prime is 21707846141. The reversal of 21707846136 is 63164870712.

21707846136 is a `hidden beast` number, since 21 + 7 + 0 + 7 + 8 + 4 + 613 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 21707846091 and 21707846100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150748860 + ... + 150749003.

It is an arithmetic number, because the mean of its divisors is an integer number (2449670145).

Almost surely, 2^21707846136 is an apocalyptic number.

It is an amenable number.

21707846136 is an abundant number, since it is smaller than the sum of its proper divisors (37084237344).

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

21707846136 is a wasteful number, since it uses less digits than its factorization.

21707846136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301497875 (or 301497868 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 21707846136 in words is "twenty-one billion, seven hundred seven million, eight hundred forty-six thousand, one hundred thirty-six".