21426214 has 8 divisors (see below), whose sum is σ = 32277960. Its totient is φ = 10666896.

The previous prime is 21426203. The next prime is 21426217. The reversal of 21426214 is 41262412.

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 (21426217) 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 3 ways as a sum of consecutive naturals, for example, 22524 + ... + 23455.

It is an arithmetic number, because the mean of its divisors is an integer number (4034745).

Almost surely, 2^21426214 is an apocalyptic number.

21426214 is a deficient number, since it is larger than the sum of its proper divisors (10851746).

21426214 is a wasteful number, since it uses less digits than its factorization.

21426214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46214.

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

The square root of 21426214 is about 4628.8458604711. The cubic root of 21426214 is about 277.7464261268.

Adding to 21426214 its reverse (41262412), we get a palindrome (62688626).

The spelling of 21426214 in words is "twenty-one million, four hundred twenty-six thousand, two hundred fourteen".