21107000 has 32 divisors (see below), whose sum is σ = 49392720. Its totient is φ = 8442400.

The previous prime is 21106997. The next prime is 21107017. The reversal of 21107000 is 70112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9554 + ... + 11553.

Almost surely, 2^21107000 is an apocalyptic number.

21107000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21107000 is an abundant number, since it is smaller than the sum of its proper divisors (28285720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21107000 is a wasteful number, since it uses less digits than its factorization.

21107000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21128 (or 21114 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 21107000 is about 4594.2355185602. The cubic root of 21107000 is about 276.3602032279.

Adding to 21107000 its reverse (70112), we get a palindrome (21177112).

The spelling of 21107000 in words is "twenty-one million, one hundred seven thousand".