21484116 has 108 divisors (see below), whose sum is σ = 60723936. Its totient is φ = 6629040.

The previous prime is 21484097. The next prime is 21484121. The reversal of 21484116 is 61148412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 21484116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 693021 + ... + 693051.

Almost surely, 2^21484116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21484116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30361968).

21484116 is an abundant number, since it is smaller than the sum of its proper divisors (39239820).

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

21484116 is a wasteful number, since it uses less digits than its factorization.

21484116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 59 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 21484116 is about 4635.0961155083. The cubic root of 21484116 is about 277.9963942047.

The spelling of 21484116 in words is "twenty-one million, four hundred eighty-four thousand, one hundred sixteen".