21107006 has 8 divisors (see below), whose sum is σ = 31987200. Its totient is φ = 10444608.

The previous prime is 21106997. The next prime is 21107017. The reversal of 21107006 is 60070112.

It is a happy number.

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

It is a congruent 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, 54206 + ... + 54593.

It is an arithmetic number, because the mean of its divisors is an integer number (3998400).

Almost surely, 2^21107006 is an apocalyptic number.

21107006 is a deficient number, since it is larger than the sum of its proper divisors (10880194).

21107006 is a wasteful number, since it uses less digits than its factorization.

21107006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108898.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 21107006 is about 4594.2361715524. The cubic root of 21107006 is about 276.3602294145.

Adding to 21107006 its reverse (60070112), we get a palindrome (81177118).

The spelling of 21107006 in words is "twenty-one million, one hundred seven thousand, six".