21244108 has 6 divisors (see below), whose sum is σ = 37177196. Its totient is φ = 10622052.

The previous prime is 21244073. The next prime is 21244121. The reversal of 21244108 is 80144212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2655510 + ... + 2655517.

Almost surely, 2^21244108 is an apocalyptic number.

It is an amenable number.

21244108 is a deficient number, since it is larger than the sum of its proper divisors (15933088).

21244108 is a wasteful number, since it uses less digits than its factorization.

21244108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5311031 (or 5311029 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 21244108 is about 4609.1331072122. The cubic root of 21244108 is about 276.9573107329.

The spelling of 21244108 in words is "twenty-one million, two hundred forty-four thousand, one hundred eight".