21014063 has 16 divisors (see below), whose sum is σ = 24975360. Its totient is φ = 17301600.

The previous prime is 21014047. The next prime is 21014069. The reversal of 21014063 is 36041012.

It is a cyclic number.

It is not a de Polignac number, because 21014063 - 2⁴ = 21014047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014069) 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, 38573 + ... + 39113.

It is an arithmetic number, because the mean of its divisors is an integer number (1560960).

Almost surely, 2^21014063 is an apocalyptic number.

21014063 is a deficient number, since it is larger than the sum of its proper divisors (3961297).

21014063 is a wasteful number, since it uses less digits than its factorization.

21014063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21014063 is about 4584.1098372530. The cubic root of 21014063 is about 275.9539892146.

Adding to 21014063 its reverse (36041012), we get a palindrome (57055075).

The spelling of 21014063 in words is "twenty-one million, fourteen thousand, sixty-three".