21006314 has 32 divisors (see below), whose sum is σ = 38050560. Its totient is φ = 8502912.

The previous prime is 21006311. The next prime is 21006329. The reversal of 21006314 is 41360012.

It is a junction number, because it is equal to n+sod(n) for n = 21006292 and 21006301.

It is not an unprimeable number, because it can be changed into a prime (21006311) 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 in 15 ways as a sum of consecutive naturals, for example, 28292 + ... + 29024.

It is an arithmetic number, because the mean of its divisors is an integer number (1189080).

Almost surely, 2^21006314 is an apocalyptic number.

21006314 is a deficient number, since it is larger than the sum of its proper divisors (17044246).

21006314 is a wasteful number, since it uses less digits than its factorization.

21006314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21006314 is about 4583.2645570597. The cubic root of 21006314 is about 275.9200654186.

Adding to 21006314 its reverse (41360012), we get a palindrome (62366326).

The spelling of 21006314 in words is "twenty-one million, six thousand, three hundred fourteen".