21628106 has 8 divisors (see below), whose sum is σ = 32585760. Its totient is φ = 10766188.

The previous prime is 21628031. The next prime is 21628121. The reversal of 21628106 is 60182612.

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

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, 23366 + ... + 24273.

It is an arithmetic number, because the mean of its divisors is an integer number (4073220).

Almost surely, 2^21628106 is an apocalyptic number.

21628106 is a deficient number, since it is larger than the sum of its proper divisors (10957654).

21628106 is a wasteful number, since it uses less digits than its factorization.

21628106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47868.

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

The square root of 21628106 is about 4650.6027566327. The cubic root of 21628106 is about 278.6160707141.

The spelling of 21628106 in words is "twenty-one million, six hundred twenty-eight thousand, one hundred six".