21048284 has 12 divisors (see below), whose sum is σ = 37161264. Its totient is φ = 10430784.

The previous prime is 21048283. The next prime is 21048317. The reversal of 21048284 is 48284012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21048281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22832 + ... + 23735.

It is an arithmetic number, because the mean of its divisors is an integer number (3096772).

Almost surely, 2^21048284 is an apocalyptic number.

It is an amenable number.

21048284 is a deficient number, since it is larger than the sum of its proper divisors (16112980).

21048284 is a wasteful number, since it uses less digits than its factorization.

21048284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46684 (or 46682 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 21048284 is about 4587.8408865173. The cubic root of 21048284 is about 276.1037032411.

The spelling of 21048284 in words is "twenty-one million, forty-eight thousand, two hundred eighty-four".