21369695 has 8 divisors (see below), whose sum is σ = 26471040. Its totient is φ = 16544160.

The previous prime is 21369679. The next prime is 21369709. The reversal of 21369695 is 59696312.

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

It is not a de Polignac number, because 21369695 - 2⁴ = 21369679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68780 + ... + 69089.

It is an arithmetic number, because the mean of its divisors is an integer number (3308880).

Almost surely, 2^21369695 is an apocalyptic number.

21369695 is a deficient number, since it is larger than the sum of its proper divisors (5101345).

21369695 is a wasteful number, since it uses less digits than its factorization.

21369695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137905.

The product of its digits is 87480, while the sum is 41.

The square root of 21369695 is about 4622.7367435319. The cubic root of 21369695 is about 277.5019938715.

The spelling of 21369695 in words is "twenty-one million, three hundred sixty-nine thousand, six hundred ninety-five".