21410680 has 32 divisors (see below), whose sum is σ = 48762000. Its totient is φ = 8459776.

The previous prime is 21410657. The next prime is 21410693. The reversal of 21410680 is 8601412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 6544.

Almost surely, 2^21410680 is an apocalyptic number.

21410680 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 21410680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24381000).

21410680 is an abundant number, since it is smaller than the sum of its proper divisors (27351320).

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

21410680 is a wasteful number, since it uses less digits than its factorization.

21410680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6543 (or 6539 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 21410680 is about 4627.1676001632. The cubic root of 21410680 is about 277.6792878684.

The spelling of 21410680 in words is "twenty-one million, four hundred ten thousand, six hundred eighty".