21560135716 has 12 divisors (see below), whose sum is σ = 43120271488. Its totient is φ = 9240058152.

The previous prime is 21560135671. The next prime is 21560135717. The reversal of 21560135716 is 61753106512.

21560135716 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21560135717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385002396 + ... + 385002451.

Almost surely, 2^21560135716 is an apocalyptic number.

It is an amenable number.

21560135716 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21560135716 is a wasteful number, since it uses less digits than its factorization.

21560135716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770004858 (or 770004856 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 21560135716 in words is "twenty-one billion, five hundred sixty million, one hundred thirty-five thousand, seven hundred sixteen".