21466315 has 16 divisors (see below), whose sum is σ = 27963936. Its totient is φ = 15724800.

The previous prime is 21466297. The next prime is 21466349. The reversal of 21466315 is 51366412.

It is not a de Polignac number, because 21466315 - 2⁹ = 21465803 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7255 + ... + 9775.

It is an arithmetic number, because the mean of its divisors is an integer number (1747746).

Almost surely, 2^21466315 is an apocalyptic number.

21466315 is a deficient number, since it is larger than the sum of its proper divisors (6497621).

21466315 is a wasteful number, since it uses less digits than its factorization.

21466315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670.

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

The square root of 21466315 is about 4633.1754769272. The cubic root of 21466315 is about 277.9195935707.

The spelling of 21466315 in words is "twenty-one million, four hundred sixty-six thousand, three hundred fifteen".