21855314 has 8 divisors (see below), whose sum is σ = 35304780. Its totient is φ = 10087056.

The previous prime is 21855293. The next prime is 21855331. The reversal of 21855314 is 41355812.

It can be written as a sum of positive squares in 2 ways, for example, as 21464689 + 390625 = 4633^2 + 625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 420269 + ... + 420320.

Almost surely, 2^21855314 is an apocalyptic number.

21855314 is a deficient number, since it is larger than the sum of its proper divisors (13449466).

21855314 is a wasteful number, since it uses less digits than its factorization.

21855314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840604.

The product of its digits is 4800, while the sum is 29.

The square root of 21855314 is about 4674.9667378496. The cubic root of 21855314 is about 279.5883150629.

The spelling of 21855314 in words is "twenty-one million, eight hundred fifty-five thousand, three hundred fourteen".