21483684 has 48 divisors (see below), whose sum is σ = 56548800. Its totient is φ = 7051968.

The previous prime is 21483641. The next prime is 21483689. The reversal of 21483684 is 48638412.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21483689) 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 15 ways as a sum of consecutive naturals, for example, 5752 + ... + 8720.

It is an arithmetic number, because the mean of its divisors is an integer number (1178100).

Almost surely, 2^21483684 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 21483684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28274400).

21483684 is an abundant number, since it is smaller than the sum of its proper divisors (35065116).

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

21483684 is a wasteful number, since it uses less digits than its factorization.

21483684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3041 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 21483684 is about 4635.0495142986. The cubic root of 21483684 is about 277.9945308863.

It can be divided in two parts, 2148 and 3684, that added together give a cube (5832 = 18³).

The spelling of 21483684 in words is "twenty-one million, four hundred eighty-three thousand, six hundred eighty-four".