21466135 has 4 divisors (see below), whose sum is σ = 25759368. Its totient is φ = 17172904.

The previous prime is 21466103. The next prime is 21466141. The reversal of 21466135 is 53166412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21466135 - 2⁵ = 21466103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146609 + ... + 2146618.

It is an arithmetic number, because the mean of its divisors is an integer number (6439842).

Almost surely, 2^21466135 is an apocalyptic number.

21466135 is a deficient number, since it is larger than the sum of its proper divisors (4293233).

21466135 is an equidigital number, since it uses as much as digits as its factorization.

21466135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293232.

The product of its digits is 4320, while the sum is 28.

The square root of 21466135 is about 4633.1560517643. The cubic root of 21466135 is about 277.9188167619.

It can be divided in two parts, 2146 and 6135, that added together give a square (8281 = 91²).

The spelling of 21466135 in words is "twenty-one million, four hundred sixty-six thousand, one hundred thirty-five".