21114284 has 6 divisors (see below), whose sum is σ = 36950004. Its totient is φ = 10557140.

The previous prime is 21114283. The next prime is 21114293. The reversal of 21114284 is 48241112.

It is not an unprimeable number, because it can be changed into a prime (21114283) 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 as a sum of consecutive naturals, namely, 2639282 + ... + 2639289.

It is an arithmetic number, because the mean of its divisors is an integer number (6158334).

Almost surely, 2^21114284 is an apocalyptic number.

It is an amenable number.

21114284 is a deficient number, since it is larger than the sum of its proper divisors (15835720).

21114284 is a wasteful number, since it uses less digits than its factorization.

21114284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278575 (or 5278573 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 21114284 is about 4595.0281827210. The cubic root of 21114284 is about 276.3919900949.

Adding to 21114284 its reverse (48241112), we get a palindrome (69355396).

The spelling of 21114284 in words is "twenty-one million, one hundred fourteen thousand, two hundred eighty-four".