21300760 has 96 divisors (see below), whose sum is σ = 54548640. Its totient is φ = 7468032.

The previous prime is 21300757. The next prime is 21300791. The reversal of 21300760 is 6700312.

It is a congruent number.

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, 155412 + ... + 155548.

It is an arithmetic number, because the mean of its divisors is an integer number (568215).

Almost surely, 2^21300760 is an apocalyptic number.

21300760 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 21300760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27274320).

21300760 is an abundant number, since it is smaller than the sum of its proper divisors (33247880).

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

21300760 is a wasteful number, since it uses less digits than its factorization.

21300760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 21300760 is about 4615.2746397154. The cubic root of 21300760 is about 277.2032810369.

The spelling of 21300760 in words is "twenty-one million, three hundred thousand, seven hundred sixty".