21560743428600 has 96 divisors (see below), whose sum is σ = 66840271056000. Its totient is φ = 5749362426240.

The previous prime is 21560743428593. The next prime is 21560743428629. The reversal of 21560743428600 is 682434706512.

It is a self number, because there is not a number n which added to its sum of digits gives 21560743428600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20584371 + ... + 21606429.

It is an arithmetic number, because the mean of its divisors is an integer number (696252823500).

Almost surely, 2^{21560743428600} is an apocalyptic number.

21560743428600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21560743428600 is an abundant number, since it is smaller than the sum of its proper divisors (45279527627400).

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

21560743428600 is a wasteful number, since it uses less digits than its factorization.

21560743428600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057237 (or 1057228 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 21560743428600 in words is "twenty-one trillion, five hundred sixty billion, seven hundred forty-three million, four hundred twenty-eight thousand, six hundred".