21214462 has 8 divisors (see below), whose sum is σ = 32119416. Its totient is φ = 10507992.

The previous prime is 21214451. The next prime is 21214463. The reversal of 21214462 is 26441212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214463) 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, 49353 + ... + 49780.

It is an arithmetic number, because the mean of its divisors is an integer number (4014927).

Almost surely, 2^21214462 is an apocalyptic number.

21214462 is a deficient number, since it is larger than the sum of its proper divisors (10904954).

21214462 is a wasteful number, since it uses less digits than its factorization.

21214462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99242.

The product of its digits is 768, while the sum is 22.

The square root of 21214462 is about 4605.9159783913. The cubic root of 21214462 is about 276.8284201136.

Adding to 21214462 its reverse (26441212), we get a palindrome (47655674).

The spelling of 21214462 in words is "twenty-one million, two hundred fourteen thousand, four hundred sixty-two".