21414466 has 4 divisors (see below), whose sum is σ = 32121702. Its totient is φ = 10707232.

The previous prime is 21414461. The next prime is 21414529. The reversal of 21414466 is 66441412.

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., 20566225 + 848241 = 4535^2 + 921^2 .

It is not an unprimeable number, because it can be changed into a prime (21414461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5353615 + ... + 5353618.

Almost surely, 2^21414466 is an apocalyptic number.

21414466 is a deficient number, since it is larger than the sum of its proper divisors (10707236).

21414466 is a wasteful number, since it uses less digits than its factorization.

21414466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10707235.

The product of its digits is 4608, while the sum is 28.

The square root of 21414466 is about 4627.5766876412. The cubic root of 21414466 is about 277.6956540281.

Adding to 21414466 its reverse (66441412), we get a palindrome (87855878).

The spelling of 21414466 in words is "twenty-one million, four hundred fourteen thousand, four hundred sixty-six".