21483312 has 20 divisors (see below), whose sum is σ = 55498680. Its totient is φ = 7161088.

The previous prime is 21483307. The next prime is 21483317. The reversal of 21483312 is 21338412.

It is an interprime number because it is at equal distance from previous prime (21483307) and next prime (21483317).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21483317) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 223737 + ... + 223832.

It is an arithmetic number, because the mean of its divisors is an integer number (2774934).

Almost surely, 2^21483312 is an apocalyptic number.

It is an amenable number.

21483312 is an abundant number, since it is smaller than the sum of its proper divisors (34015368).

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

21483312 is a wasteful number, since it uses less digits than its factorization.

21483312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447580 (or 447574 counting only the distinct ones).

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

The square root of 21483312 is about 4635.0093851038. The cubic root of 21483312 is about 277.9929263421.

It can be divided in two parts, 2148 and 3312, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 21483312 in words is "twenty-one million, four hundred eighty-three thousand, three hundred twelve".