21032068560 has 80 divisors (see below), whose sum is σ = 65348257920. Its totient is φ = 5595747840.

The previous prime is 21032068543. The next prime is 21032068573. The reversal of 21032068560 is 6586023012.

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

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 15 ways as a sum of consecutive naturals, for example, 5550 + ... + 205170.

It is an arithmetic number, because the mean of its divisors is an integer number (816853224).

Almost surely, 2^21032068560 is an apocalyptic number.

21032068560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21032068560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32674128960).

21032068560 is an abundant number, since it is smaller than the sum of its proper divisors (44316189360).

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

21032068560 is a wasteful number, since it uses less digits than its factorization.

21032068560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200076 (or 200070 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 21032068560 in words is "twenty-one billion, thirty-two million, sixty-eight thousand, five hundred sixty".