21410560 has 72 divisors (see below), whose sum is σ = 52612560. Its totient is φ = 8343552.

The previous prime is 21410537. The next prime is 21410563. The reversal of 21410560 is 6501412.

It is not an unprimeable number, because it can be changed into a prime (21410563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54846 + ... + 55234.

It is an arithmetic number, because the mean of its divisors is an integer number (730730).

Almost surely, 2^21410560 is an apocalyptic number.

21410560 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 21410560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26306280).

21410560 is an abundant number, since it is smaller than the sum of its proper divisors (31202000).

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

21410560 is an equidigital number, since it uses as much as digits as its factorization.

21410560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 21410560 is about 4627.1546332492. The cubic root of 21410560 is about 277.6787690996.

Adding to 21410560 its reverse (6501412), we get a palindrome (27911972).

The spelling of 21410560 in words is "twenty-one million, four hundred ten thousand, five hundred sixty".