21244106 has 8 divisors (see below), whose sum is σ = 34317444. Its totient is φ = 9804960.

The previous prime is 21244073. The next prime is 21244121. The reversal of 21244106 is 60144212.

It can be written as a sum of positive squares in 2 ways, for example, as 21242881 + 1225 = 4609^2 + 35^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408515 + ... + 408566.

Almost surely, 2^21244106 is an apocalyptic number.

21244106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21244106 is a deficient number, since it is larger than the sum of its proper divisors (13073338).

21244106 is a wasteful number, since it uses less digits than its factorization.

21244106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817096.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21244106 is about 4609.1328902517. The cubic root of 21244106 is about 276.9573020417.

Adding to 21244106 its reverse (60144212), we get a palindrome (81388318).

The spelling of 21244106 in words is "twenty-one million, two hundred forty-four thousand, one hundred six".