21324886 has 16 divisors (see below), whose sum is σ = 35225280. Its totient is φ = 9601480.

The previous prime is 21324883. The next prime is 21324893. The reversal of 21324886 is 68842312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2176 + ... + 6883.

It is an arithmetic number, because the mean of its divisors is an integer number (2201580).

Almost surely, 2^21324886 is an apocalyptic number.

21324886 is a deficient number, since it is larger than the sum of its proper divisors (13900394).

21324886 is a wasteful number, since it uses less digits than its factorization.

21324886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9179.

The product of its digits is 18432, while the sum is 34.

The square root of 21324886 is about 4617.8876123180. The cubic root of 21324886 is about 277.3078983212.

The spelling of 21324886 in words is "twenty-one million, three hundred twenty-four thousand, eight hundred eighty-six".