21414266 has 4 divisors (see below), whose sum is σ = 32121402. Its totient is φ = 10707132.

The previous prime is 21414257. The next prime is 21414269. The reversal of 21414266 is 66241412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 1745041 = 4435^2 + 1321^2 .

It is not an unprimeable number, because it can be changed into a prime (21414269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5353565 + ... + 5353568.

Almost surely, 2^21414266 is an apocalyptic number.

21414266 is a deficient number, since it is larger than the sum of its proper divisors (10707136).

21414266 is a wasteful number, since it uses less digits than its factorization.

21414266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707135.

The product of its digits is 2304, while the sum is 26.

The square root of 21414266 is about 4627.5550780083. Note that the first 3 decimals coincide. The cubic root of 21414266 is about 277.6947895143.

Adding to 21414266 its reverse (66241412), we get a palindrome (87655678).

The spelling of 21414266 in words is "twenty-one million, four hundred fourteen thousand, two hundred sixty-six".