21041214 has 8 divisors (see below), whose sum is σ = 42082440. Its totient is φ = 7013736.

The previous prime is 21041213. The next prime is 21041221. The reversal of 21041214 is 41214012.

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

21041214 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21041193 and 21041202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041213) 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, 1753429 + ... + 1753440.

It is an arithmetic number, because the mean of its divisors is an integer number (5260305).

Almost surely, 2^21041214 is an apocalyptic number.

21041214 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21041214 is a wasteful number, since it uses less digits than its factorization.

21041214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506874.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21041214 is about 4587.0703068516. The cubic root of 21041214 is about 276.0727858864.

Adding to 21041214 its reverse (41214012), we get a palindrome (62255226).

The spelling of 21041214 in words is "twenty-one million, forty-one thousand, two hundred fourteen".