21364282 has 8 divisors (see below), whose sum is σ = 32085216. Its totient is φ = 10669212.

The previous prime is 21364267. The next prime is 21364307. The reversal of 21364282 is 28246312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21364282.

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, 4248 + ... + 7795.

It is an arithmetic number, because the mean of its divisors is an integer number (4010652).

Almost surely, 2^21364282 is an apocalyptic number.

21364282 is a deficient number, since it is larger than the sum of its proper divisors (10720934).

21364282 is a wasteful number, since it uses less digits than its factorization.

21364282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932.

The product of its digits is 4608, while the sum is 28.

The square root of 21364282 is about 4622.1512307582. The cubic root of 21364282 is about 277.4785612310.

The spelling of 21364282 in words is "twenty-one million, three hundred sixty-four thousand, two hundred eighty-two".