21014443 has 8 divisors (see below), whose sum is σ = 21452400. Its totient is φ = 20579328.

The previous prime is 21014429. The next prime is 21014453. The reversal of 21014443 is 34441012.

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

It is a cyclic number.

It is not a de Polignac number, because 21014443 - 2⁹ = 21013931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21014443.

It is not an unprimeable number, because it can be changed into a prime (21014453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20323 + ... + 21331.

It is an arithmetic number, because the mean of its divisors is an integer number (2681550).

Almost surely, 2^21014443 is an apocalyptic number.

21014443 is a deficient number, since it is larger than the sum of its proper divisors (437957).

21014443 is a wasteful number, since it uses less digits than its factorization.

21014443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 21014443 is about 4584.1512845891. The cubic root of 21014443 is about 275.9556525750.

Adding to 21014443 its reverse (34441012), we get a palindrome (55455455).

The spelling of 21014443 in words is "twenty-one million, fourteen thousand, four hundred forty-three".