21134617 has 8 divisors (see below), whose sum is σ = 24192896. Its totient is φ = 18086112.

The previous prime is 21134611. The next prime is 21134657. The reversal of 21134617 is 71643112.

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 21134617 - 2⁷ = 21134489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21134591 and 21134600.

It is not an unprimeable number, because it can be changed into a prime (21134611) 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, 3013 + ... + 7165.

It is an arithmetic number, because the mean of its divisors is an integer number (3024112).

Almost surely, 2^21134617 is an apocalyptic number.

It is an amenable number.

21134617 is a deficient number, since it is larger than the sum of its proper divisors (3058279).

21134617 is an equidigital number, since it uses as much as digits as its factorization.

21134617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887.

The product of its digits is 1008, while the sum is 25.

The square root of 21134617 is about 4597.2401503511. The cubic root of 21134617 is about 276.4806832173.

Adding to 21134617 its reverse (71643112), we get a palindrome (92777729).

The spelling of 21134617 in words is "twenty-one million, one hundred thirty-four thousand, six hundred seventeen".