21826106 has 8 divisors (see below), whose sum is σ = 33294240. Its totient is φ = 10728028.

The previous prime is 21826099. The next prime is 21826109. The reversal of 21826106 is 60162812.

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

It is not an unprimeable number, because it can be changed into a prime (21826109) 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, 92366 + ... + 92601.

It is an arithmetic number, because the mean of its divisors is an integer number (4161780).

Almost surely, 2^21826106 is an apocalyptic number.

21826106 is a deficient number, since it is larger than the sum of its proper divisors (11468134).

21826106 is a wasteful number, since it uses less digits than its factorization.

21826106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185028.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 21826106 is about 4671.8418209524. The cubic root of 21826106 is about 279.4637098822.

Adding to 21826106 its reverse (60162812), we get a palindrome (81988918).

The spelling of 21826106 in words is "twenty-one million, eight hundred twenty-six thousand, one hundred six".