21089695 has 16 divisors (see below), whose sum is σ = 27845280. Its totient is φ = 15333120.

The previous prime is 21089683. The next prime is 21089711. The reversal of 21089695 is 59698012.

It is not a de Polignac number, because 21089695 - 2⁷ = 21089567 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5071 + ... + 8239.

It is an arithmetic number, because the mean of its divisors is an integer number (1740330).

Almost surely, 2^21089695 is an apocalyptic number.

21089695 is a deficient number, since it is larger than the sum of its proper divisors (6755585).

21089695 is an equidigital number, since it uses as much as digits as its factorization.

21089695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207 (or 3185 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 21089695 is about 4592.3517940158. The cubic root of 21089695 is about 276.2846560809.

The spelling of 21089695 in words is "twenty-one million, eighty-nine thousand, six hundred ninety-five".