21284483 has 8 divisors (see below), whose sum is σ = 23312880. Its totient is φ = 19271680.

The previous prime is 21284423. The next prime is 21284489. The reversal of 21284483 is 38448212.

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

It is a cyclic number.

It is not a de Polignac number, because 21284483 - 2⁸ = 21284227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21284489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (2914110).

Almost surely, 2^21284483 is an apocalyptic number.

21284483 is a deficient number, since it is larger than the sum of its proper divisors (2028397).

21284483 is a wasteful number, since it uses less digits than its factorization.

21284483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7797.

The product of its digits is 12288, while the sum is 32.

The square root of 21284483 is about 4613.5109190290. The cubic root of 21284483 is about 277.1326546432.

The spelling of 21284483 in words is "twenty-one million, two hundred eighty-four thousand, four hundred eighty-three".