21560026160 has 80 divisors (see below), whose sum is σ = 50473704000. Its totient is φ = 8564548608.

The previous prime is 21560026153. The next prime is 21560026171. The reversal of 21560026160 is 6162006512.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12050546 + ... + 12052334.

It is an arithmetic number, because the mean of its divisors is an integer number (630921300).

Almost surely, 2^21560026160 is an apocalyptic number.

21560026160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21560026160 is an abundant number, since it is smaller than the sum of its proper divisors (28913677840).

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

21560026160 is a wasteful number, since it uses less digits than its factorization.

21560026160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758 (or 2752 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 21560026160 in words is "twenty-one billion, five hundred sixty million, twenty-six thousand, one hundred sixty".