21410480 has 160 divisors (see below), whose sum is σ = 65245824. Its totient is φ = 6340608.

The previous prime is 21410479. The next prime is 21410489. The reversal of 21410480 is 8401412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21410489) by changing a digit.

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, 123674 + ... + 123846.

Almost surely, 2^21410480 is an apocalyptic number.

21410480 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 21410480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32622912).

21410480 is an abundant number, since it is smaller than the sum of its proper divisors (43835344).

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

21410480 is a wasteful number, since it uses less digits than its factorization.

21410480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 21410480 is about 4627.1459886198. The cubic root of 21410480 is about 277.6784232527.

Adding to 21410480 its reverse (8401412), we get a palindrome (29811892).

The spelling of 21410480 in words is "twenty-one million, four hundred ten thousand, four hundred eighty".