21814126 has 4 divisors (see below), whose sum is σ = 32721192. Its totient is φ = 10907062.

The previous prime is 21814123. The next prime is 21814141. The reversal of 21814126 is 62141812.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21814126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21814123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5453530 + ... + 5453533.

It is an arithmetic number, because the mean of its divisors is an integer number (8180298).

Almost surely, 2^21814126 is an apocalyptic number.

21814126 is a deficient number, since it is larger than the sum of its proper divisors (10907066).

21814126 is a wasteful number, since it uses less digits than its factorization.

21814126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10907065.

The product of its digits is 768, while the sum is 25.

The square root of 21814126 is about 4670.5594953924. The cubic root of 21814126 is about 279.4125694729.

Adding to 21814126 its reverse (62141812), we get a palindrome (83955938).

The spelling of 21814126 in words is "twenty-one million, eight hundred fourteen thousand, one hundred twenty-six".