21443034 has 8 divisors (see below), whose sum is σ = 42886080. Its totient is φ = 7147676.

The previous prime is 21443033. The next prime is 21443047. The reversal of 21443034 is 43034412.

It is a sphenic number, since it is the product of 3 distinct primes.

21443034 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21443034.

It is not an unprimeable number, because it can be changed into a prime (21443033) 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, 1786914 + ... + 1786925.

It is an arithmetic number, because the mean of its divisors is an integer number (5360760).

Almost surely, 2^21443034 is an apocalyptic number.

21443034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21443034 is a wasteful number, since it uses less digits than its factorization.

21443034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573844.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 21443034 is about 4630.6623716268. The cubic root of 21443034 is about 277.8190859220.

Adding to 21443034 its reverse (43034412), we get a palindrome (64477446).

The spelling of 21443034 in words is "twenty-one million, four hundred forty-three thousand, thirty-four".