21483630 has 112 divisors (see below), whose sum is σ = 66419424. Its totient is φ = 4898880.

The previous prime is 21483593. The next prime is 21483641. The reversal of 21483630 is 3638412.

It is a happy number.

21483630 is a `hidden beast` number, since 21 + 4 + 8 + 3 + 630 = 666.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21483594 and 21483603.

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 55 ways as a sum of consecutive naturals, for example, 50820 + ... + 51240.

Almost surely, 2^21483630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21483630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33209712).

21483630 is an abundant number, since it is smaller than the sum of its proper divisors (44935794).

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

21483630 is an equidigital number, since it uses as much as digits as its factorization.

21483630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 21483630 is about 4635.0436891145. The cubic root of 21483630 is about 277.9942979698.

It can be divided in two parts, 2148 and 3630, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 21483630 in words is "twenty-one million, four hundred eighty-three thousand, six hundred thirty".