21483644 has 24 divisors (see below), whose sum is σ = 46273248. Its totient is φ = 8498880.

The previous prime is 21483641. The next prime is 21483689. The reversal of 21483644 is 44638412.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21483644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483641) 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 7 ways as a sum of consecutive naturals, for example, 29147 + ... + 29874.

It is an arithmetic number, because the mean of its divisors is an integer number (1928052).

Almost surely, 2^21483644 is an apocalyptic number.

It is an amenable number.

21483644 is an abundant number, since it is smaller than the sum of its proper divisors (24789604).

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

21483644 is a wasteful number, since it uses less digits than its factorization.

21483644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59045 (or 59043 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 21483644 is about 4635.0451993481. The cubic root of 21483644 is about 277.9943583556.

The spelling of 21483644 in words is "twenty-one million, four hundred eighty-three thousand, six hundred forty-four".