21414617 has 6 divisors (see below), whose sum is σ = 24910938. Its totient is φ = 18355344.

The previous prime is 21414571. The next prime is 21414619. The reversal of 21414617 is 71641412.

It can be written as a sum of positive squares in only one way, i.e., 13097161 + 8317456 = 3619^2 + 2884^2 .

It is not a de Polignac number, because 21414617 - 2⁸ = 21414361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21414619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218468 + ... + 218565.

It is an arithmetic number, because the mean of its divisors is an integer number (4151823).

Almost surely, 2^21414617 is an apocalyptic number.

It is an amenable number.

21414617 is a deficient number, since it is larger than the sum of its proper divisors (3496321).

21414617 is an equidigital number, since it uses as much as digits as its factorization.

21414617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437047 (or 437040 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 21414617 is about 4627.5930028472. The cubic root of 21414617 is about 277.6963067324.

The spelling of 21414617 in words is "twenty-one million, four hundred fourteen thousand, six hundred seventeen".