21063417 has 4 divisors (see below), whose sum is σ = 28084560. Its totient is φ = 14042276.

The previous prime is 21063403. The next prime is 21063451. The reversal of 21063417 is 71436012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21063417 - 2²² = 16869113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21063517) 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, 3510567 + ... + 3510572.

It is an arithmetic number, because the mean of its divisors is an integer number (7021140).

Almost surely, 2^21063417 is an apocalyptic number.

It is an amenable number.

21063417 is a deficient number, since it is larger than the sum of its proper divisors (7021143).

21063417 is an equidigital number, since it uses as much as digits as its factorization.

21063417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021142.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 21063417 is about 4589.4898409300. The cubic root of 21063417 is about 276.1698571121.

Adding to 21063417 its reverse (71436012), we get a palindrome (92499429).

The spelling of 21063417 in words is "twenty-one million, sixty-three thousand, four hundred seventeen".