21324103560 has 96 divisors (see below), whose sum is σ = 72950904000. Its totient is φ = 5387140224.

The previous prime is 21324103547. The next prime is 21324103571. The reversal of 21324103560 is 6530142312.

21324103560 is a `hidden beast` number, since 213 + 2 + 410 + 35 + 6 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1551940 + ... + 1565619.

It is an arithmetic number, because the mean of its divisors is an integer number (759905250).

Almost surely, 2^21324103560 is an apocalyptic number.

21324103560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21324103560 is an abundant number, since it is smaller than the sum of its proper divisors (51626800440).

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

21324103560 is a wasteful number, since it uses less digits than its factorization.

21324103560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117595 (or 3117588 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21324103560 its reverse (6530142312), we get a palindrome (27854245872).

The spelling of 21324103560 in words is "twenty-one billion, three hundred twenty-four million, one hundred three thousand, five hundred sixty".