21410466 has 64 divisors (see below), whose sum is σ = 53968896. Its totient is φ = 5546640.

The previous prime is 21410437. The next prime is 21410471. The reversal of 21410466 is 66401412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55711 + ... + 56093.

It is an arithmetic number, because the mean of its divisors is an integer number (843264).

Almost surely, 2^21410466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21410466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26984448).

21410466 is an abundant number, since it is smaller than the sum of its proper divisors (32558430).

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

21410466 is a wasteful number, since it uses less digits than its factorization.

21410466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21410466 is about 4627.1444758079. The cubic root of 21410466 is about 277.6783627294.

Adding to 21410466 its reverse (66401412), we get a palindrome (87811878).

The spelling of 21410466 in words is "twenty-one million, four hundred ten thousand, four hundred sixty-six".